I think cooler would be to use the front-facing (low resolution) camera as a hand gesture touchless control - like this demo
http://www.youtube.com/watch?v=7DikbVmYLR0
(check out the part at 1:16 mins where you control music playback with hand gestures)

And if this is true, then it works on a S60 platform, it should work on the more powerful Nokia IT at least.