Syngery rocks! At my desk at work I have one linux computer that I do my software development on and a windows laptop that I use to check email and verify that the web app works in IE7. Now with two monitors I can switch back and forth between them with one mouse and keyboard just like they were one computer. Basically the program starts redirecting computer and mouse output to the other computer when the mouse hits the edge of the screen. It feels very natural like you are using one computer with two monitors. You can’t drag windows between the two computers (though I bet using something like VNC this could be coded up).