T-Mobile hasn't been bought by AT&T yet! That process will take at least a year to work through the system, so we've still got plenty of stuff coming from the soon-to-be-swallowed-up carrier. Today: the G2x, T-Mobile's first phone to work on their 42Mbps 4G network.
The G2x is a Tegra 2 based Android smartphone with a 4-inch screen, a 1GHz dual-core processor and an 8MP rear camera. There's no word or pricing, but T-Mo says to expect it sometime later this Spring.