T-Mobile’s got a not-so-secret event planned for April 21

Calling all T-Mobile G1 Fanboys, time to get excited. It looks like T-Mobile has been sending out invitations to a private launch event taking place on April 21, a little bit less than 3 weeks from now, in the Big Apple.

Unfortunately, T-Mobile has not released any details as to what they will be announcing, but you may recall that their last big event was to announce the T-Mobile G1, the first phone running Google’s Android platform. The G1 has done fairly well, so there is good reason to suspect T-Mobile to announce a G2, perhaps, or even another Google Android phone. One phone that is likely to be a focus of T-Mobile at the event could be the HTC Magic, a phone that was recently made available in the UK.