This via email today:
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).
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.
I will do my next round of reviews once I have installed the RC rather than on the Beta.