I have upgraded to Windows 7 RTM but Unity Pro is now not licensed. I am using an academic license and so the activation server thinks I have a new PC and refuses to activate. I sent an email but I have no idea how long I have to wait. I was going to upgrade Friday evening but I would have had to have waited until at least Monday until someone looked at the email.
I know this is not the first message expressing frustration but when it happens to you it’s personal.
If you’ve sent an e-mail, then your request should definitely be processed soon - they are pretty efficient.