we have been trying and failing to get the xen guys interested in 9p as the backbone comms for inter-domain communication in Xen, both dom0->domU and domU->domU.
I think it would be a hard sell. You'd still want to have something like a shared memory queue to exchange messages but on top of that you'd have a rather large amount of 9p machinery.
ron
Tim Newsham http://www.lava.net/~newsham/
