I've been playing the Think Tanks Demo on my cab
The online play is pretty fun. It's a 3D combat style game.
It's not real cab friendly because I see no way to re-map the keys, but it uses arrows for moving and mouse for aiming and shooting so it works well on my cab with the trackball.
The demo version does require you to enter a player name each time you fire it up so you will need a keyboard accessible.
you can download the demo here
www.garagegames.comThey have other games that may be fun on a cab also.
Most of their games have mac & Linux versions also.
Slug54