Even though I come away believing half the stuff is made up, Overheard in New York and Overheard in the Office are consistently entertaining. Recent entries:
Girl: Isn’t your dad Swiss? Guy: No, he’s Swedish. Girl: Oh, that’s right: people are Swedish, things are Swiss. Well, actually, they’re interchangeable. - Overheard in New York
Engineer #1: What the hell were you thinking when you wrote this code? Engineer #2: Boobs. Engineer #1: Huh?! Engineer #2: Truthfully, it’s likely I was thinking about boobs. - Overheard in the Office