After adding a few things to the new DIY Multitouch PC forum, I thought it would be good to point you to an historical multitouch document: Andrew Wilson of Microsoft Research published TouchLight: An Imaging Touch Screen and Display for Gesture-Based Interaction and presented a few years ago. Good reminder.

Had a fun time playing with the homemade multitouch box yesterday. Here's a picture with it hooked up to a Lenovo x60 Tablet PC while I'm playing with Smoke. Loren goes into detail about how built the little multitouch box.

Tips:

1. Use a small box, such as 7"x7"
2. Cover the hole for the cord with duct tape to block extra light
3. Use a picture frame as the "lid" to the box. If you use paper alone press lightly or else your lid will cave in :)

Disney's new Ultimate WALL·E has, "An innovative touch programming system lets kids direct WALL·E simply by making patterns on the remote's touch pad."

Great idea to use gestures on a remote!