As Brandon just posted on the windowsteamblog.com this afternoon, the Windows 7 Release Candidate (RC) is "on track for April 30th for download by MSDN and TechNet subscribers. Broader, public availability will begin on May 5th."
"Many of your suggestions helped us refine the new and improved taskbar, the behavior of Aero Peek, Touch, Windows Media Player, and much more. In case you have missed the previous E7 blog entry outlining some of these changes in detail, you can read about them here and here."
Plan accordingly. And please remember to back up your files.
Also available via http://tinyurl.com/d6td9d