http://plan9.bell-labs.com/magic/man2html/4/upasfs
http://plan9.bell-labs.com/magic/man2html/4/webfs
Reading your links now.
Edit: Yeah, that's pretty much what I was envisioning. I need to play with plan9 more:-\
http://plan9.bell-labs.com/magic/man2html/4/upasfs
http://plan9.bell-labs.com/magic/man2html/4/webfs