Dodgeball (see dodgeball.com), the mobile social networking service, has launched in a bunch of US cities, moving beyond its NYC origins.

[via email]

++ dodgeball now up and running in 10 U.S. cities!

Brand new this week: Austin, Chicago, Portland, Seattle and Washington DC! So two weeks ago: New York, San Francisco, Los Angeles, Boston and Philadelphia. Make sure to tell your friends that live in those far away lands to get on board!

++ Turning in for the night?

Hey, sometimes we want to go to bed early too. We've added the ability to stop receiving messages for the evening. Just send the word "off" to us and we'll close you out for the night. Don't worry though, you'll be back in action the next day.

++ "Help, I've cloned my friends!"

We got a bunch of emails from people who somehow ended up with 4 copies of their friends. Weird, but we think we've got it figured out. If this sounds familiar, log in and check out our new "delete friends" tool.

++ What happened to dodgeball last week?

Some of you might have noticed that we were experiencing some problems last week. We're sorry if we weren't there when you needed us most. The good news is we're back better than ever and should be running smoothly from now on.

So in one email, all the pros and cons of a "successful" launch. Service problems from fast growth, critical new features (like deleting "friends" and the ability to turn the service off) being retrofitted, bugs being stamped out, and expansion -- in this case, into new cities.