CENTRIC Tech has put together a tutorial/demo/gear porn video for controlling a Novation Bass Station with iPad apps to play Pink Floyd's On The Run and Money. The 200 or so of you that just got iPads for presents may also be interested in his rudimentary video on using the Camera Connection Kit for MIDI, where he explains the setup you see here with helpful recommendations.
Update: The video has now become private. Very odd, I've contacted Centric. Sorry about that!
Update 2: Centric got back to me. He was unhappy with the quality of the recording so he refilmed it! New version embedded below.
In this episode I demonstrate the iPad Camera Connection Kit's ability to process midi in and out simultaneously. To do this I play Pink Floyd's "On The Run" sequence using the Little Midi Machine App for iPad to send midi to a Novation Bass Station analog synth, while play the bass riff for "Money" on the iPad app Animoog via a midi controller. Furthermore I show how you can actually control the sound parameters of an external synth using a custom made midi template in the app Midi Designer