Yes! oh, these memories... I may still have the sources of my bots around. Nasty algorithms with zone based tactics, opponent learning with neural nets, stochastic movement patterns, wheeesh.
We are still busy with new games, tron, kriegspiel and ludo are the next ones coming. Will ask the developers to look on robocode also. Thanks for the tip! :) If you have other nice games for AI, please let us know.
I'm the maintainer of LiteRumble [1], which is the official continual rankings of all Robocode bots. The Robocode install includes a client, which (offline) runs the battles that then get uploaded to the LiteRumble server, similar to SETI/Folding@home.
If you need anything on the Literumble which would help with an integration, don't hesitate the let me know. Discussion about developement of all Robocode related things happens on the RoboWiki [2].