Well, Microsoft has announced that Windows 7 RTM will be available in the second half of July and will be available publicly in stores Oct 22, 2009.
See below:
http://www.microsoft.com/presspass/features/2009/Jun09/06-02SteveGuggenheimer.mspx
Read the complete post at http://owsug.ca/blogs/brad/archive/2009/06/03/Windows-7-RTM-and-public-availability-announced_2100_.aspx