It seems that there have been leaks around the next Samsung Galaxy S phone for T-Mobile USA. The original Samsung Vibrant has sold over a million on T-Mobile's network, and it seems they're following up with a 4G version.
The Samsung Vibrant 4G is set to be released with Android 2.2, and a front facing camera added to the original's specs. It is a bit annoying to see a 4G version of the phone released without Android 2.2 being released on the original. One can only hope that the original Samsung Vibrant will receive an Android 2.2 OTA update.