Thanks! We're out in Mountain View now, but we built out our own shop a year ago in Miami, FL. About 90% of the manufacturing on Double is still done there today by our contract workers. We have a Haas VF-2SS mill and have made custom fixtures for most of the parts on the robot. We purchased a Stratasys FDM printer and brought it with us out to CA with us to do rapid prototyping during YC. All of the prototype electronics were hand-soldered under a microscope and tested in house, but we will soon be handing that off to a PCB Assembly house now that the boards are finalized.

As far as driving goes, we have 3 or 4 different methods we want to experiment with once things settle down, but so far the joystick-style is most intuitive. OpenTok's new iOS to iOS video has cut down on the lag a bunch.

Thanks for the comments!

-marc @ double