We've got our hands on T-Mobile's reported Android Roadmap for the rest of the year and though it looks somewhat suspect, the conclusions are fairly logical. According to the roadmap we can expect an updated T-Mobile G1 to be released some time in Fall of this year along with the mysterious Samsung Houdini.
This timeframe makes a lot of sense because the G1 would have been on the market for one whole calendar year and would be in desperate...