Huh. Color us confused. We had originally reported about an OTA update that would update the build of Android on your T-Mobile G1 to the build number of RC28. The original build was RC19. The one showing up to a few lucky folks who got the update early? RC29. 

What do all these build numbers mean? Probably a whole lot of nothing yet other than the basic bug fixes and stability issues. Other than that, we're probably saying goodbye to RC28 before we ever said hello. Nice to meet you RC29!

The update reportedly takes only about 5 minutes and requires a reboot of your G1.

[Engadget]