Wouldn't it be great to edit the same document, live, in realtime, together with everyone in your group?

This collaborative note taking application was used extensively at O'Reilly's Emerging Technologies Conference. It can take advantage of Zero Configuration networking so even without an IP connection, participants can collaborate on note taking. I'll have a copy running on my laptop. If you are at NECC, and use Mac OS X, download a copy and see if you see me. We can trade notes... :-)