Both Joe & I were at a conference and started the first sessions taking notes, me on my tablet PC and Joe on his LiveScribe pen (http://www.livescribe.com/) - needless to say 4 hours later my tablet battery was flat but Joe's solution kept on going without faltering for the entire day (and the next one for that matter). During a lull in the second day (and whilst my tablet still had it's new battery life that day) I went online and ordered my own LiveScribe setup.
I'm now starting to see people use these in many meetings (@mikiSandorfi being the latest) - everybody I show it to 'gets it immediately' and wants to know costs and where to buy it from, so here's the list of LiveScribe equipment I purchased :-
Mini Leather book
A4 Ringbound Notepads