Electronics Expo has the Akai Synthstation25 25-Key Keyboard Controller For iPhone and iPod Touch for $61 - $3 off with coupon code BIGBEN
+ $7 shipping = $65 shipped
. Features professional audio outputs, two octaves of velocity-sensitive synth-action keys, pitch and modulation wheels, and integrates perfectly with the Akai Pro SynthStation app
and select third party apps.