Windows 7 General Availability on October 22
According to The Windows Blog, http://windowsteamblog.com/blogs/windows7/archive/2009/06/02/the-date-for-general-availability-ga-of-windows-7-is.aspx, Windows 7 will be in stores by Oct 22 and RTM in late July.
I am using the Windows 7 Release Candidate on my non-production machine and so far, so good. There is every reason to think that Windows 7 will be dramatically better than Vista, so I am looking forward to late July, and not just because it will finally be sunny for more than 4 or 5 days in a row in Seattle.