In today's MSDN Flash that was delivered to my mailbox, it stated that the Windows 7 RTM would be available for MSDN Subscribers on August 6th. It is interesting that the link in the newsletter didn't go to a page that confirmed this. The exact wording was:
Developers will be able to complete their testing on the final version of Windows 7 by accessing the Windows 7 RTM bits via their MSDN subscriptions beginning August 6, 2009.
Pretty simple and to the point. If you were looking to replace your Release Candidate bits (that will expire) with something a little more solid, then it looks like you won't have to wait much longer.