Kapture Pad for Ableton
I know you gonna dig this http://liine.net/en/products/kapturepad/ 
Cheap as chips too!
Oi! Stop making me want an iPad!
Haha, works on an iphone too, get both while your at the store! 
Seriously tho, this is a really great app for djing and production with Live.
iām very tempted to buy an ipad2, just looks like a tidy controller that can have pages of useful controlls, at the moment i use a launchpad and bcr2000 and end up with a cramped booth