The Windows Product Team have published a blog entry on what their expectations are of the Beta testers, and what the Beta Testes can expect once the Windows 7 Release Candidate is released.

It is possible to upgrade Windows 7 Beta to RC, but it is not the most important thing. Windows Vista upgrades and Migrations from Windows XP are what end users will be doing and receive priority, so the path may not be very easy for beta testers.

Have a look at the blog here and see how it affects you.