Command-Option-F will send terminal into full screen in OS X Lion (or most any other app for that matter). You can also use the double-arrow button in the top right corner of an application’s title bar to make it full screen. Command-Option-F (or switching to another app or Window that isn’t full screen) will end your full screen session. For any app, you can have one window that is full screen and others that aren’t full screen. Mission Control then shows all the full screen apps at the top of the screen and those that aren’t full screen towards the bottom. I thought I really needed multiple Terminal windows, but…