The computer opponent is based on a neural net and seems to play reasonably well. I have profited greatly from the gnubg source code and some pointers from members of the gnubg team.
I have released the alpha Soumille to members of the Yahoo Trictrac Group. You can join the group at http://groups.yahoo.com/group/trictrac/. I expect to release a beta to the group in the next many weeks and will probably sell the production version for a small amount as shareware.