http://www.youtube.com/watch?v=2ivGtkfUkqU

MidiMe is an iOS midi control application that lets you control many different MIDI parameters simultaneously.

It also lets you record and play back MIDI gestures and send your instruments ‘bouncing around the room’ with MidiMe’s bounce mode.
http://www.youtube.com/watch?v=HSIQK8RSCio

On the iPad, MidiMe’s keyboard mode lets you record MIDI gestures  that are triggered by every keypress.

MidiMe supports midi over WiFi and Apple’s camera connection kit to connect MidiMe to hardware midi devices.

MidiMe is $4.99 in the App Store.