Here are the Droideka instructions, by request. Shouldn't be too hard to figure out, though one of the pieces is a little difficult to come by. If you plan on using this design, please credit me!
Figuring out how to build this droid was a pain in the can. I think I've really nailed it this time though, as it is really quite small and very accurate for it's scale. No it doesn't roll up, but I'm sure that could be managed by adding more pieces. Still, somthing must be sacrificed to the accuracy gods, no?
Please comment or offer improvement, it is much appeciated.