tmmm:
If you've watched the video, you've probably noticed a circular menu with 12 selections: how would you do that mashing together a couple of optical mice?If you can explain it to me I would be pretty happy!
Actually, I wasn't clear just what input methods it provides. Is the tilt input proportional, or binary? Are there touch sensors around the rim or was that menu being driven by tilting?
Nothing there looks particularly difficult, but exactly what you need to provide it will depend on exactly what you're trying to provide.