That's HTC Flash Lite, which only works on Sense ROMs and doesn't support all features of Flash 10.1. We will never get Flash 10.1, it's just too complicated to try and get it to work on ARMv6 processors without official support.
Is that what zach has in xtr ROMs? I don't recall him saying it's flash lite (heck even that would be good enough) as he specifically says its 10.1 (although i do see the flashlight apk in the system/app folder anyway) I've seen posts of the modified apks for 2.1 but they reportably only work with sense based roms.
I know people get annoyed at the flash questions but in all honesty these won't go away until these phones get so old everyone has moved on or someone writes up an article on WHY it doesn't work (and i mean including why also hacking the APK is difficult, not just 'adobe will not support armv6') and those who asked why get directed to it. I don't see any of the no's i've found follow with a link with details, just other forums that have 'no'.
Putting up an post/forum saying "it doesn't work" will not appease the masses.
Anywho "workshed" i'm glad to hear you are gonna share your eris port with CM. I think they would greatly benefit from your work