I want this so much!
It's a 3d printer that can produce just about any object you are able to model in a CAD program. It builds them out of the same sort of plastic from which Lego is made. And this one, which comes as a kit you assemble, costs only $750US. Considering that the cheapest one I've heard of before this cost more than $10,000US, that's amazing.
That said... I don't actually know what I'd make with it. Probably just little toys and knicknacks. I'd probably also start working on more robotty projects when I knew I could make any gear or unique part I liked.
So, my question is, what would you build with your own 3d printer?
EDIT: the same company is building a 3d scanner kit, so you could scan any object and reproduce it. Starting with my wang.