If that is true, then this patent can be made null by producing the "prior art" that shows someone else thought of it first.

This patent looks pretty specific, however, and I don't think they'll be able to prove that they own the concept of multitouch as a whole, just the iPhone's implementation of it.

Jeff Han drew gasps and applause from the audience when he demonstrated multitouch in Feb. 2006 at TED. Here's a demo of another multitouch device from 2006. In his demo, Han claims that "Bill Buxton" (?) was working on multitouch in the 80s.