Some random DIY stuff...
Motorized panorama head for iPod/iPhone. Gears from printer & toy car and winding motor from old camera. Takes about 1 min 20 seconds for a full rotation.
iPad tripod mount
Rotary speaker mkI - more details here: Silvery Squeaks
Rotary speaker mkII with foot pedal speed control - more details here: Silvery Squeaks
Electro-Theremin/Tannerin - sort of like what the Beach Boys used on Good Vibrations - more details here:Silvery Squeaks
Austerity Street - cheering art for troubled times - more photos here: Flickr
iThrush - bird automaton - wood, plastic, aluminium, electrical parts & papier mache
more photos here: Flickr & a video: