My mom called me yesterday and told me about it. It's called "Overheard in Pittsburgh" and it's basically a group of people that go to random places around town and blog what they overhear. A lot of the stuff posted is really funny and obviously 100% anonymous.
I guess it's a off shoot of "Overheard in New York"...either way good way to kill some time. I was laughing out loud a few times last night.