Unsurprisingly Android's robot theme leads to plenty of 'bot related mods and projects, and we're particularly keen on Hideyuki Takei and Reo Matsumura's Android-Robo. Basically a motorized Android model that has flashing eyes, a rotating head and articulated arms - and that can make all manner of R2D2-style bleeps and gurgles - the 'bot can be remotely controlled over Bluetooth via your Android phone.
As you may have gathered, actual uses for the Android-Robo are few and far between - perhaps he could gain a speaker and read out text messages or announce Caller IDs? - but somehow he's still cute enough to warrant space on your desk. There's a project site here, but so far no instructions on how to make your own.