Hopefully getting this for Christmas..
It's like a controller for iTouch/iPhone, for software that supports it. At the moment, I believe it's only Akai's own software, and the apparently incredible NanoStudio. Velocity sensitive and modulation/pitch wheels - you can also use it as a full MIDI controller and shiznit.
It sells for around £75/$99, which seems pretty reasonable to me.
Guess this could be a handy tool for some portable musicians who would prefer to play a real keyboard hm?