Sure, you remember Dodgeball. But how about Kozmo? SixDegrees? They don't have much in common except for two things: they're dead websites, and they'd still be kicking if they'd just timed things better.
I like going out to bars and everything, but I think I'd like it more if I could nerdily acquire fake trophies and points while doing so. Finally, my dream has become a reality with Foursquare.