Windows 7 officially goes on sale October 22, 2009.  Many people installed the beta and RC versions of the operating system and have been very pleased.  I too installed the early betas and eventually the RC code.  I have been pleasantly surprised with all the builds.  The OS is fast and responsive and the new user interface features really improve my productivity.  I am running the RTM code on my laptop and a Gateway Netbook (http://www.gateway.com/systems/product/529668268.php ) and they both run great. 

If you haven't dome so already checkout these videos of the new features:

What's New in Windows 7 - Videos
http://www.microsoft.com/windows/windows-7/features/videos.aspx

For those of you who work in IT check out this article from TechNet Magazine written by Bill Boswell.

The 10 Things to Do First for Windows 7
http://technet.microsoft.com/en-us/magazine/ee518862.aspx