I don't use the service, but I see it as a blog like tool. If you have one, you only use it in scenarios you'd like to tell everyone about. If you're at a bas

I don't use the service, but I see it as a blog like tool. If you have one, you only use it in scenarios you'd like to tell everyone about. If you're at a baseball game, you use it to buy beers and they automatically post something like "John Doe bought 4 beers at the Giants game".