[DigitalJack]

I make extensive use of screen sharing, OneNote, and a wacom tablet. It works out pretty well, but you are right, it's not as nice as a whiteboard.

I've toyed around with the whole wiimote / projector idea as a cheap collaborative whiteboard. Sadly my company is not as open to "out of the box / off the wall" ideas as I am. It wouldn't be as useful if the other side didn't participate in the same way.

Perhaps there is a product / startup idea here. A projector with a camera built in, or something like that.

The HP Touchsmart computers would probably be an easier way to go. It would be nice if somebody marketed touch capabilities as an augmentation to traditional computer interaction rather than as a primary interface.