A little off topic, but: what do people use secondary monitors for? Problably a dumb question, but I'm curious. I mean, extra screen space is always nice, but is it really worth the bulkiness, heat emission, power consumption, etc? I tried using my old 17" as secondary monitor for a while, but I never felt I had any particular use for it (not to mention that my desk started creaking under the load of two monitors, of which one is an old 21" LaCie that probably weighs as much as a small aircraft...)