I picked up one of these printers on a whim the other day:
Polaroid PoGo
It's an incredibly fun little gadget - not much bigger than a pack of cigarettes, when plugged into the USB port of your camera, it spits out little 2x3 color prints in about 60 seconds. And the prints have a peel-off backing so you can use them like Post-It notes. Very reminiscent of the Polaroid of old...
Anyway, I'm sure these things are targeted at the teen crowd with their phone cameras - but I'm curious if any of the older & wiser members here have discovered this thing and have any creative stories to tell?