I got an official Email from MS today on the RC release.
Windows 7 Release Candidate Announcement
Thank you very much for your help in testing the Windows 7 Beta. Your feedback is invaluable in helping make Windows 7 a high quality operating system. With your help, we have reached the next major milestone on the journey to Windows 7: the Release Candidate (RC).
Today (April 30) the RC is available to MSDN subscribers and TechNet Plus subscribers.
On Tuesday, May 5 (PST), the RC will be available to everyone via our Customer Preview Program. As with the Beta, the Windows 7 RC Customer Preview Program is a broad public program that offers the RC free to anyone who wants to download it. It will be available at least through June 30, 2009, with no limits on the number of downloads or product keys available.
So you don’t need rush to make sure you get your copy. When you’re ready to download the RC, it’ll be waiting for you.