That's right, Windows 7 RC has been given an expiration date far ahead in the mists of time: June 1st, 2010, to be exact. So don't be shy about giving it a whirl.
These ridiculous people at National Auto Warranty Services (US Fidelis) are the only people to ever spam-call me on my cellphone. Now I know why.
Don't forget that Apple's Boot Camp beta, the software that lets you install Windows on a Mac, will expire this month upon OS X 10.5's release. No worries though, all you have to do is upgrade to 10.5 and you'll be safe.[Apple]