Build your own multi-touch display

turkey+tek writes: "Between the Jazzmutant LEMUR, Jeff Han's beautiful demos Microsoft's interactive table, and the Apple iPhone, multi-touch displays are all the rage these days. For the home hardware hacker, the question is "How can I build one myself on the cheap?" [e.g. this ask slashdot].

This instructable will show you how to turn your lcd projector and webcam into an interactive multi-touch display table using a few cheap components readily available from the hardware store by leveraging an existing open source software library touchlib."