If I have 10 finder windows open on Desktop 1 they are all stacked in a small space in mission control, which makes it hard to choose a particular window. Is it possible to somehow temporary "unstack" them in mission control, like a mini expose?
The only way to do that is to upgrade to Snow Leopard. Lion wasn't designed for use with more than 1 open window. They took the idea of no multitasking in iOS and ported that idea to OS X.