JazzMutant has released this teaser for Mu - a multi-touch Ableton Live controller for the Lemur.
And tease it does. Mu is one of the sexier music apps we've seen recently.
Check out the video demo, and you'll find that Mu does the does the obvious things, like clip and scene triggering and mixing, in an elegant, futuristic way. But, as you can see towards the end of the demo, Mu also has some creative tricks up its sleeve.
Note that Mu is a Max for Live plugin - so you'll need Ableton Live 8 + Max for Live to use it.