Max For Live is going to open a lot of door for Ableton Live users - as this video by Matthew Davidson demonstrates.
In the video, Davidson uses the Monome to control OBO, his Max version of the ToneMatrix synth/sequence:
I've adapted obo for use in maxforlive, added monome 128/256 support (not required for operation), 16 pattern memory, edit while play, copy/paste patterns and a scale generator.
Interesting stuff - and Max For Live isn't even out yet!
Check out the resources below if you're interested in using Max For Live with matrix controllers.
Gaz Williams has one and he brought it round