GestPoint has some cool gesture recognition going on with two of the upcoming Xbox 360 Eye-Toy cameras. Using two instead of one, they can detect motion in 3d space, in a sort of Wii-controller like fashion. Using your finger or other body part, you can direct a sword or other objects on the screen up, down, left, right, in, and out. The fun part is the in and out.
This can also be used in public terminals as a replacement for a mouse. Minority Report-like screens can be had in your own living room.