Ah, the wonders of the XDA-Developer Forums! So much good talent among the developers there! One in particular, ezterry, has ported the myTouch 3G’s Froyo 2.2 update to the Godfather of Androids, the G1.Here is the good news: EVERYTHING WORKS! It is a stable port that has all of the Android 2.2 features found on the latest myTouch 3G OTA update! The bad news: You have to have a rooted device and have a few pre-requisites such as the infamous 1.33.2005 Danger SPL and 2.22 radio. If you still have a G1, though, and have not rooted it by now, this is a very good reason to do so! Check out the XDA post HERE.
(images from AndroidSPIN)