I implemented the plugin on top of ENET (a very fast lightweight UDP library). ENET was specifically designed for fast online multiplayer gaming. http://enet.bespin.org/ It can be used for free or commercial games w/o cost just reference me and the ENET license http://enet.bespin.org/License.html.
The plugin uses UDP (both a fast unreliable (e.g. position updates) and a slower reliable (e.g. chats)) for communication. It also supports virtual channels so you should never put reliable and unreliable comms on same channel.
I built an example net shooter game w/ CC v1.1 to show you how it works and also included a short README.
Network Plugin - Download
Updated v0.3a - Aug 14th to add condition "On connect failed" for the client and fixed chat bug (you can type any characters now).