Bonjour has the widest adoption of any of the zeroconf technologies, yes the Apple version is not entirely compliant with the whole standard, but there is no implementation out there which is! Before you declare rendezvous dead, you should see what would replace it. Nothing! Bonjour will morph to whatever else comes down the pipe. It already supposrts DNS-SD and mDNS, and I'm sure that whatever other standards come down the pipe will be able to be accommodated as well.