Tested the new OS yet?  Please visit the official site:

http://www.microsoft.com/windowsvista

Do remember to download the release candidate 1 and join the customer preview program:

http://www.microsoft.com/windowsvista/getready/preview.mspx

For RC2, which released on Oct 6:

http://download.windowsvista.com/preview/rc2/en/download.htm

Cheers,

MingSen