On one of T-Mobile’s support forum threads, The T-Mobile G2 Gingerbread leak for build 2.3.3 is creating some steam. It looks like the official Android 2.3.3 build for the G2 is now available, with a couple of minor bugs still, but none the less, it’s there. So if you’re OK with installing this very close to complete build for Gingerbread 2.3.3 on the G2, here’s some more information to help you along the way, including the bug list, and instructions on how to get it running.
As always, be sure to run backups of your device in the event something goes wrong with the update. I recommend Titanium Backup for starters.