I was going to see the new Myspace site for The Ark music club in Ann Arbor here at Caribou, and got this for my troubles instead:
This site is blocked by WanderingWiFi content filtering service.
It looks like they're using SonicWALL. Haven't probed the rest of the net yet to see what other brokenness there is, but I do note that Facebook does seem to work.
It's hard to put a value on social networking sites, but I'm certain that they're less valuable when you are cut off from them arbitrarily based on where you happen to be.