This sample Xcode project uses my PhoneGap Bonjour Plugin and shows how to perform Bonjour (ZeroConf) service browsing, publication, & resolution. It also shows how to send data between devices via TCP using CocoaAsyncSocket.
I have already included the CocoaAsyncSocket library and frameworks needed in this project. If you want to use CocoaAsyncSocket in your own project please read here about ARC - https://github.com/robbiehanson/CocoaAsyncSocket/wiki/ARC
Update 01/09/2014
When I developed this my JavaScript knowledge was far less than I have now. There are so many things I wish I would have done differently after gaining more experience. I don't have the time to refactor most of my JavaScript and get rid of the DOM abuse. I simply admit that I look back on some of my JavaScript now and eek because I know it should have been done differently.