Windows Home Server RC1 signup link
Date: 05/15/07
(Computer Geeks) Keywords: microsoft
http://connect.microsoft.com/WindowsHomeServer
If you just happens to have a spare pc w/dvd drive laying around that you hardly use, you can amuse yourself with this once the download is available. It's a headless OS so the way to control it would be from another machine.
Source: http://community.livejournal.com/computergeeks/1071752.html