I see your point. It does sound like zeroconf would be useful to some people. I wonder if it could be done with a 9p orientation as eric suggested.
I don't recall what the security issues are with zeroconf, but, if it's the microsoft-inspired version I'm thinking of, I would guess there are many. I wonder if Plan 9 could provide some angle to make it more secure? Anyway, I did not mean to discourage your enthusiasm; go for it and let us know what we can do to help. ron