The operating system arrived on the main Microsoft.com late on Monday night. The software was slated to be made publicly available on Tuesday.

The release candidate version, officially build 7100, is expected to be the last major public test of the product before it is finalized. The company will only officially confirm it plans to release Windows 7 before Windows Vista hits its third anniversary of broad availability in January. However, the software maker is widely seen as aiming to finish it soon enough for it to be on PCs that ship during this year's holiday shopping season.

From; http://news.cnet.com/8301-13860_3-10233399-56.html?tag=newsEditorsPicksArea.0

Download Windows 7 RC at;

http://www.microsoft.com/windows/windows-7/download.aspx
or
http://technet.microsoft.com/en-us/evalcenter/dd353205.aspx?ITPID=mscomsc