Currently, Ableton Live 8 is $499.00 (new) and $425.00 (used).

The release notes according to Ableton:

Improvements and feature changes

• Added bank names for Amp instant mapping, which in turn fixes a problem with the Axiom DirectLink control surface.
• Fixed problems with the Mbox2 related to non-integer sample rates.
• Added control surface support for Akai Professional LPD8.
• From now on, betas will ask to check for updates only once a week, and starting a week after first run.
• the "Peek" button on the Axiom Pro now works as a momentary control

Max for Live improvements and feature changes

(Note: Most of these changes require an update to the latest version of Max, which is available from http://cycling74.com/downloads/)

• Devices inside Racks can now be accessed via the Max for Live API
• Return tracks can now be observed via the Max for Live API

Live devices and parameters can now be much more easily mapped to controls in Max devices. Devices can safely be moved within a Live Set without breaking any existing mappings. Also, devices and Sets can be saved and loaded without breaking existing mappings. The following changes make this possible:

• There is now a simple way to observe the selected parameter via the Max for Live API, using "live.path live_set view selected_parameter." This can be used, for example, to build a custom "map mode" to quickly map parameters in your Live Set to controls in a Max device.
• Live objects like tracks, clips or parameters retain their identity (id nn) during operations like move, save/restore, cut/paste, delete/undo, the identity is global and can be communicated via Max's Send and Receive objects.
• live.object, live.observer and live.remote~ are now able to remember their target objects when Live sets or presets are saved and restored or when objects are moved within the Live set.
• Ableton protected samples can now be used in Max for Live device, via the Live.drop object
• fixed a bug where clip slots would lose their id on moving a clip
• fixed navigating and observing control surfaces via the LiveAPI
• Repeatedly calling "goto control_surfaces" on a live.path object was producing a different id each time
• Fixed a crash that occurred when deleting a Rack containing a Max for Live device, where a Remote~ was controlling one of the Macro knobs, and then Undoing the delete action
• Navigating the Live Object Model is about two times faster
• Fixed a crash that occurred when moving tracks that contained automated Max for Live devices
• Fixed a crash that occurred when replacing one Max for Live device with another if certain modulations existed
• If a native Ableton device has parameters that are mapped to a Max for Live device, the mappings will be preserved after hot-swapping the Ableton device
• The Track/Chain Activator and Song Tempo are now accessible via the "selected_parameter" property and their path can be queried
• "live_app" and "live_app view" can now be persistent in the Max for Live API
• Mapping some mixer component on the APC40 (for example) through the Max for Live API wouldn't work without pressing the Pan or Send button on the APC40, which reset the component. This has been fixed.
• "goto live_set tracks 2 devices" in a set with one track produced id -1, which is wrong. Now it produces id 0.
• If the LOM id of the observer is persistent, the property of an observed LOM object is persistent, even if it is dynamically changed using a message.
• Max for Live devices that control the Application objects (e.g. live_app (live_app view)) or which get information about the Live version and document name (e.g. get_major_version (focus_view)) will work when loading the Set, without requiring user interaction.

Bugfixes

• Fixed a problem with nested Macro mappings when the range of a mapped ON/OFF switch, or of a selector switch (such as a filter type switch), is not at default values. In such a case, the right value would be displayed, but the wrong value would be used internally.

Note: with this fix, you will now hear what you see, although this may mean that previously saved Sets that contained the bug may sound different.

• Deleting time in the Arrangment View could delete crossfades in certain cases.
• When using an APC40 and Scratch Live, Scratch Live would sync to the APC but would not initially show the return tracks .
• If the VST plug-ins folder contained shorcuts/aliases to files in another location on disk, the folder would be rescanned each time Live starts. This has been fixed.
• When launching a scene with via Key/MIDI mapping or a control surface such as the APC40 while "Select on Launch" is enabled, the Master track became selected. This would result in the selected device switching to the device on the Master track. Now, launching a scene via remote control behaves the same as when launching with the mouse; the device selection doesn't change.
• Fixed a crash that could occur when clicking the status bar, while it displays "Media files are missing", and just after having adjusted a Macro knob.
• Fixed a crash that occurred when adding an audio clip, scrubbing in the clip detail view, and pressing Undo while the mouse was still down for scrubbing.
• Fixed a crash that could occur when switching between certain audio interfaces on a Mac
• updated Complex Pro libraries to prevent a potential crash
• fixed Transport button behavior for the Akai MPK61 and 88
• fixed a crash that could occur when opening very large Live Sets
• fixed a crash that could occur when a clip referencing a sample was in the clipboard and when pressing the Edit button (in the File Manager or Clip View) to set the sample offline and then on again
• Holding a note while recording a MIDI clip and stopping the transport while the note is held would result in a silent note during play back
• If a clip was in Gate Mode, releasing the trigger key within the launch quantization period would still launch the clip
• Fixed a bug that caused a clip in Gate launch mode to continue playing after clicking another clip for a very short time
• Fixed a bug in how MIDI effect Racks handle latency. Now chains compensate properly against each other

• A very short MIDI note at the beginning of a clip would not be audible. [6130]
• Recording via 'Resampling' would not properly compensate latency. [6124]
• Under certain conditions, it would be possible to get 2 Arranger tracks highlighted. [6144]
• Using the Launchpad as control surface and additionally for manual mappings would not always work properly.
• When installing Live Packs which have dependencies to other content, Live would show the corresponding message twice. [6153]
• Using a Rex file could crash Live. [6157]
• 'lock control surface' function would not properly work in user remote scripts. [6064]
• A particular Live set could not be loaded and would lead to a 'Invalid Product ID Error' message. [6165]
• In the Arranger, punch In/Out would delay notes by the 'punch in time' in beats. [6167]
• Using the pads of the Akai MPD18 would not work properly.
• Having a Live set with particular Drum Racks could increase the CPU usage of the main thread, which would result in very slow graphical updates. [6181]
• Installing a new Library from within a second running instance of Live could crash Live. [6171]
• Certain operations like sample crop/reverse/replace would remove the tempo envelope. [6179]
• Using Novation's Launchpad, when switching between Automap and Live control would not work properly.
• Under certain conditions, editing or creating parameter automation would not work properly. [6188]
• Playing a 32-bit audio file immediately after a 16-bit audio file could cause a click in the audio. [6152]
• Moving the last track out of a track group onto a closed group track in the Arranger could crash Live. [6193]
• In the Auto Pan device, switching shape to random would not show the 'Width' knob. [6192]
• Loading a Max device would crash if Pluggo was already active.
• It would not be possible to create a new Project in the File Browser if the root is set to 'Workspace'.
• Fine tuning of macro knobs would not work via key modifier. [6180]
• Starting clips via the Launchpad while changing parameters via mouse could crash Live. [6143]
• Moving the mouse over a certain Sampler preset could crash Live. [6207]
• Loading a Live set containing not yet authorized add-ons could crash Live. [6203]
• Under certain conditions, fade creation would not work properly. [6195]
• An Ableton preset of a third party plug-in would not change the On/Off mapping range. [5652]
• Receiving an invalid parameter index from Max could crash Live.
• Inverting a macro mapping range would not work properly. [6238]
• Under certain conditions, extracting an existing groove from a clip would crash Live. [6235]
• Having a Max device sending many blob changes during saving could crash Live.
• A malformed database file would interrupt user interactions like renaming files, saving presets, recording, etc. [6230]
• Having a particular Live set loaded and searching for media files could crash Live. [6241]
• On Mac OS X, under certain conditions, making Live the foreground window could lead to a crash.
• The context menu of a frozen clip would have enabled audio fades commands. [6253]
• In the Arranger, changing the mixer properties like volume, pan etc. would not show the changed value in the status bar. [3238]
• Having a multi selection of Arranger track and use the 'Show Automation' command would destroy the selection. [6243]
• Choosing a custom VST directory within the preferences would not keep this new directory until the next start of Live if the required rescan leads to a crash. [6190]
• On Mac OS X, duplicating a track with Fab Filter Twin 1+2 could crash Live. [6063]
• The Looper display would use the wrong colour in 'play' mode. [6234]
• Holding SHIFT + Space Bar would make the transport play button flicker. [6227]
• The area to click on an Arranger clip would be too small by a few pixels. [6261]
• Particular Live sets, especially with a lot of transient data, could not be loaded. [6263]
• Pasting 3 unstretched and crossfaded Arranger clips could crash Live [6289]

• Updated manuals
• Updated Help Pages

Bugfixes:

• Surface controller support for the Oxygen 3rd generation
• Using the Axiom Pro as controller surface would not work properly with certain effects and instruments
• Under certain conditions, a volume automation would not work properly [6005]
• The mouse handling of certain Sampler parameters would not work properly [5961]

Changes from Live 8.0.5 to Live 8.0.8

Improvements:

• Updated manuals
• Updated Help Pages
• Control Surface support for Novation Launchpad
• Several improvements for the AxiomPro Controllers

Bugfixes:

• Using the double/halve tempo buttons of the Looper could introduce an audible offset [5857]
• Playing MIDI could crash Live when multi-core support is enabled [5608]
• If the slot button below a disabled Session clip has been removed, the disabled clip would not respect this and act as stop button [5872]
• In the Arranger, auto scrolling would not work properly when dragging tracks [5865]
• On Mac OS X, open the application menu would not close an open context menu [5768]
• On Mac OS X, using a Remote SL and loading a particular Live set with a Fab Filter Twin 2 would crash Live
• On Mac OS X, the Key stroke handling for AudioUnits using Cocoa views would not work properly
• On Mac OS X 10.6.x, starting Live with a template set that contains audio clips, and with another CoreAudio client running at the same time (e.g. iTunes), would freeze Live. Also, changing sample rates in Live would not work properly
• Replacing a Macro mapping with a Key mapping could crash Live [5913]
• Return track header selection would not work properly [5677]
• On Mac OS X, Audio Units, wrapped by Novation Automap, would not appear in the right folders [5752]
• Setting an MTC start offset to a negative value would not show the value properly [5456]
• Grabbing and moving the left edge of an Arranger loop while the loop start is out of the view would not behave properly [5216]
• In the Arranger, scrolling would not work properly when dragging or moving tracks [5139]
• Under certain conditions, the LFO of the Sampler would not work properly
• Switching banks via remote script would not be indicated in the status bar [5969]
• Switching on track-solo would not work properly in exclusive mode when switching via the APC controller [5838]
• Unsupported multi channel audio files would crash Live [5995]
• When exporting an video file, the resulting video file would grow on each export instead to be replaced [5996]
• On Mac OS X, when typing the name of an existing file, but without the extension, Live would overwrite the existing file without asking for confirmation