Could you please share your knowledge about how to flash the latest update of stock Android OS on G1 (aka HTC Dream)? I would like to try out some custom roms, but most information I was able to find relates to the RC30 or R33.
This tutorial on Haykuro's blog was very easy to follow. I used it up to the point of flashing with the ROM I wanted.
I agree with palehorse, Haykuro's blog is very easy to follow and is where I learned the process. Once you are ready for a custom ROM, the best, by far in my opinion, are released by cyanogen. This is mostly due to their very fast speed compared to other ROMS. You can find the latest, as of me writing this, at: his post on XDA Developers