For you editors who go on location with two Macs – a backup and a main, I’ve discovered an interesting piece of software. It uses networking software that lets you use the screen of your backup computer as a second screen for your main computer. As it uses the network, I suggest that you use the backup machine to display browser windows – if there is a slight delay in displaying that sort of content, it is not a big deal. You should be able to drag clips between the screens if need be.
Check out ScreenRecycler.
You can see a movie of the application in action at on this page.
You can even use a PC as a second monitor if you have one hanging around.