CentOS - Feb 2007 - OT using apples bonjour for zero network config devices

All,

Apple has released an open source zero config dns application
http://developer.apple.com/opensource/internet/bonjour.html

Has anyone used this on centos?

I am trying and I cant figure out how to have it provide me with
a list of all devices that will respond to port 80 as an example.
Or simple a list of all devices on the network that respond would be ok 
even.

Anyone used this tool and know how to do that?
Or better yet any native centos commands I'm not aware of?

Jerry