Well, it's October 27 2015, and I just wanted to say that the G1 is still my primary phone.
I still use as primary phone my HTC G1 (Developer Edition ;)) since April 2009. I had to buy another battery.
LONG LIVE THE HTC DREAM!!!!!!! :victory:
You can still use stock recovery. See the instructions in the OP under the recovery section. But if you can't boot into the modified TWRP you may have other components compromised.
That might be the my issue, I did the hair dryer temporary fix ...
I've been using this rom for 3 days and is very stable. However, I have issues with alarm clock not working and lock-screen date/time not updating (I think these have been mentionen by other users).