I decided to dump some of my stuff on modcraft aswell. : )
AIO is a pure lua server-client communication system for Eluna and WoW.
AIO is designed for sending lua addons and data to player from server and data from player to server.
As a recent addition I have been working with SaiF to make some C API so you wouldnt have to have Eluna.
With AIO you can deal out addons and make changes to them without dealing out patches or new addon files to users afterwards.
AIO allows you to make UI to interact with your lua scripts. You can use the base WoW addon API and you will have access to few AIO specific functions for communication with the server.
AIO is using compression and obfuscation to make addon codes smaller to send. Also a cache system is in place to further reduce server side work.
Get your's now!
http://rochet2.github.io/AIO.html