I've recently decided that I'd like to try out a multi-monitor setup to see if the productivity gains that I've read about are true. One interesting resource that I've come across is http://www.realtimesoft.com/multimon/. I've got to find a fairly cheap PCI video card before I'll be able to get it set up, but I'm looking forward to huge productivity gains :-). Scott Hanselman liked it so much, he went for three monitors.
Anyone else trying a multiple-monitor setup?