Media Center Edition 2005
I have learned a few things over the last week playing with the new MCE 2005.
You can do a clean install of MCE 2005, but you cannot join a domain.
***Actually you can if you join it during setup***
You can upgrade over MCE 2004.
You can't upgrade over XP Professional. It will pop an error refering to PxShare.exe
You can however have an MCE 2005 joined to a domain. You need to do this in MCE 2004 and then do the upgrade.
I looked into why you can't join a domain and found some registry keys that are unalterable. I tried to change them, believe me, but they appeared to be locked by some method I don't understand.