For those who may not know, there has been speculation that when you go to check for updates (Menu, Settings, Software update, Check new) and it says the service is unavailable, it could mean that the update servers have been taken offline so HTC/Verizon can load a new update to them. Thus, could an update be forthcoming? Who knows... time will tell.
Myself, I can't check as I'm rooted and disabled the software update process to prevent OTA's.