20060322 -- I have started work on a VFS to (transparently) access file servers via 9P, the Plan 9 filesystem protocol. See e.g. http://en.wikipedia.org/wiki/9P
The current version of the code can be accessed here: http://plan9.bell-labs.com/sources/contrib/axel/tcl/9pvfs/
Right now there is code to mount a file system over 9P and transparently access it -- code that allows one to use 9P as a client.
Currently the access is readonly, but it is trivial to add support to write/create/delete files and create and delete directories. I'll do that soon.
The intention is to also provide support to easily create (simple) 'synthetic' (virtual) file servers that can be accessed via 9P. That would allow tcl programs to offer access to their resources via 9P.
Axel Belinfante