Ok, check out this is a letter that the people from microsoft are sending to Windows Se7en Testers:

This e-mail says that the download period of Windows 7 RC (Release Candidate) will end at August 20, if you have not download Windows 7 RC yet, and you want it.. hurry up!

Soon Windows 7 RTM (Release To Market) OS will be at the download page for us to download. (What’s new in that build? I think that visually nothing, but they correct some internal bugs, and they also add some new backgrounds… that’s the big deal).