Having multiple monitors can be beneficial, but then there comes the thoughts of burn-in when one's not "moving" much. Sometimes I'd like to play a game and leave something on my other screen to monitor, like maybe a download or a chat. The problem with this is, the chat monitor may get a little burn-in or image persistence after a while. My 20" Dell2001FP LCD will give me some image persistence when I leave anything in one spot for even a couple minutes.
I'd like to have a "screensaver" that activates when there's no activity on a screen, but being able to use the other screen(s) while the screensaver is up (i.e. mouse movements won't affect the screensaver until the mouse goes onto that screen).