I saw some buzz about this early last year (I think… I’m too lazy to go and check when I bookmarked it) and it looks like they’re gaining some traction again. What Leap Motion does is bring Minority Report style control to your computer via a small ~$70 box. They recently inked a deal with ASUS, which means it’s very likely that this won’t turn into vaporware.
I’m a little too chicken to pre-order tho.
Oh, yeah: linky thing to their site here