You can't really get a legit copy of it yet - although there is at least one build running loose on torrent sites (Note: It DOES NOT and WILL NOT have that latest IE fix in it!)

Word is that before Jan 5th it should be avail...
http://www.windowsvienna.com/how-to-download-windows-7-beta-a23.html
http://www.microsoft.com/windows/windows-7/default.aspx

>Is M$ doeing a public beta testing for Windows 7? If so where can I sign up? Have M$ anounced a date for the beta release?