Google Voice number porting officially launched

After a bit of a false start, Google's finally officially turned on Google Voice number porting for all existing users. $20 is all it takes to swap your main line over to the service, although you'll have to cancel your existing service contracts to make it all happen. The service is currently only for existing GV users, so you can't open a new account and port straight away, but Google says new accounts will get the option in the "next few weeks." So -- anyone out there going to take the plunge?