I don't understand the desired behavior in Lion at all, though. They took away all-windows Expose (I used to have one corner dedicated to all-windows and another to application-windows) and turned Spaces into this weird hybrid thing with a useless-to-me Full Screen mode... Fortunately, my personal laptop is still on Snow Leopard, and my work machine is used with a couple 24" monitors hanging off of it, so I haven't yet had to use the new way of doing things... But with the recent OS X trends I'm not sure my next laptop will be another Mac.