The news every iPad owning musician wanted confirmed - Lemur for iOS! At $49.99 it ain't cheap, but still an iPad + the app is probably less than a second hand Jazz Mutant Lemur, plus you can play Words With Friends on an iPad between flights:
"Lemur is a professional iOS controller app that doesn't cut any corners. It lets you control anything, any way you want. Lemur can control DJ software, DAWs, VJ software, visual synthesis software, stage lighting and more. Any software or hardware that can be controlled by MIDI or OSC can be controlled by Lemur.
Major stadium-touring acts such as Bjork, Deadmau5 and Daft Punk use Lemur on stage. The original hardware version was introduced to the public in 2004 and Lemur software now benefits from nearly 10 years of development. These are just two of the reasons Lemur is the name cited when talking about multitouch control.
Find out more on liine.net"