*** FOR DEVELOPERS ONLYÂ ***
Drizzy has release a new HTC Hero System Image for all developers to use as a base for your latest Android phone creations. The system image hasn’t been ported to the Tmoble G1 / Dream or the Sapphire / MyTouch3G yet so don’t try to flash it.
The release description is: ro.build.description=2.73.1100.5 146733 CL#61267 release-keys
You can download the new System Image here.