CoWNFS seems to have vanished from mortal sight.  I'll miss it; it was almost unique among Xen-related technologies in that it actually worked with minimal effort, and had a clear, logical set of steps, with easy-to-follow documentation.  The fact that it hadn't been updated in three years didn't seem especially relevant.  I guess I'll post the howto we wrote here, for historical reference.

An archive of the page is at the Wayback Machine: http://web.archive.org/web/20070811053113/http://www.russross.com/CoWNFS.html

Maybe we should just email the guy, ask him why he stopped working on CoWNFS, and what he recommends instead.  Or if he wants some free hosting.