Thanks to Scott Lininger for the following news which were posted on the PDRoms webboards:

GNUGO is an open source Go Ai engine. As a learning exercise, I ported version 1.2 to the Gameboy Advance and gave it a pretty face. It’s not the smartest Ai in the world, but you can give it whatever handicap you wish to make the game a challenge. This was a second project that I used the Krawall sound engine for, which I can’t recommend enough. I used a couple of Skaven’s excellent S3Ms for the background music. So if you’re wanting to put music into your gba games, this might be worth looking at.

http://www.thingker.com/