In order to use the 120 fps Playstation Eye camera with your IR multitouch table, you have to remove the infrared blocking filter built into the camera and add your own visible light blocking filter.
This can be accomplished in a few short steps detailed here at the nuigroup forums, and a floppy disk material can be used as your visible light filter. Cool!
Here's the hacked camera in action.
No visible light, and the IR lights from the remote are white hot. Cool!