After playing with my toys for a bit I finally found reason enough to invest in some very small servos to join the Arduino Nano 3.0 and XBees sitting on my desk. And so begins the next project:
No sound I guess...
There is a great guide on SparkFun for syncing OSC over wifi, to Processing, to an Arduino via USB. After tweaking the code - originally intended to control an LED - a little bit the iPhone can control ardWINDo's servo. I won't spill the details now, but I will say that my next project will be mobile. Watch-winder's are cool and all but only watches can ride them...