You can still download it.

Microsoft.com says you can, you can see it under ASP.NET Samples
http://www.microsoft.com/resources/sharedsource/Licensing/Developer.mspx

And this is the place to download it:
http://www.asp.net/Forums/Download/

It wasn't very easy to find, I don't think they want people downloading it anymore. I says it requires the .NET Framework 1.0 so it doesn't look like its for 2.0 Wink. Telligent probably took over the project before then because Community Server 1.x was built on ASP.NET 1.1.

EDIT: Just made the URLs hyperlinks; I always forget to do that because the toolbar doesn't work in Firefox.