Not many games actually use dual monitors, but what i think they're best for is to play a game on one screen, and have all your IM junk on the other, so you can allways see when someone is talking to you. Dual monitors are just great for keeping extra stuff up. I keep google desktop, aim buddy list, google talk buddy list, MSN and any IM's all up on the right screen, and i do internet browsing and games on the other. Also i keep all my desktop icons on the right, so i don't have to minimize anything to use them. I <3 dual monitors!