I just came up with the idea of playing tic-tac-toe with people on AG. It's very simple just follow the simple example I posted below. You can do this with two people through your profile pages. Also, if you like it you can keep stats and stuff like that! Here's the example:
--- --- ---
O-- --- ---
O-- -X- ---
O-O -X- ---
OXO -X- ---
OXO OX- ---
OXO OX- X--
so on and so forth. good luck!
ps. let me know what you think of my idea. thanks.