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OS X Lion full screen should make use of all monitors.
It would be great if Full Screen and Distraction Free Mode on OS X Lion used all monitors instead of just one. For example, if the layout is 2 columns and the monitors are horizontally arranged, show 1 column on each screen. Or if the layout is 4 rows and the monitors are vertically arranged, show 2 rows on each screen. etc.
Customer support service by UserEcho
An example of an app that does this is VMware Fusion.