I have Win7 pre-ordered, is there any chance I'll be able to use the key I'll get in October with my current install? It was such a pain in the arse to bend win7 to my will, I'd rather not have to go through it again if possible. What I have now is perfect.
Nate
Why on earth would you choose to use the Release Candidate over the final build?

Short answer is no, though. It's a pain yes, but it's pre-release software so you can't really complain.