I just got my HTC S620 from Expansys TODAY, and you'll be surprised to hear that it is running the ROM posted in the first post of this message:
The phone is very stable and fast, with no issues at all. Very pleased with the OS (previous Windows phone was a slow Tmobile Vario). Plus the form-factor is superb.... :)
I'll let you know if I run into any bugs. So far though (1/2 day of use), no issues....
What is this new ROM supposed to fix anyway?