Building documentation from XML comment files

I've been a big fan of NDoc for generating professional looking documentation from XML comment files.  Unfortunately, it seems development on NDoc has stalled of late, and support for generating documentation for .NET 2.0 code is still beta.  The good news is that Microsoft has just released a CTP of the tool they use internally, called Sandcastle.  This is an early (i.e. rough) release, but a good step in the right direction.  Here's a blog entry from MS with more info:

http://blogs.msdn.com/sandcastle/default.aspx

See the bottom of that blog page for the download link.  Note it's an early beta with a command-line interface.  Cheers!