Adam forwarded a link along to an article at the NY Times on the online (and offline) trading of live concerts. I'm aware of a couple communities that do this, but I'm pretty much limited from trading due to my lack of a high-speed connection at home and not a great deal of stuff to trade after the bulk of the live stuff I had was stolen several years ago along with a third of my cd collection. Now if I could only find someone who had the whole Yesoteric collection who'd be willing to do a B+P...