If you open Spaces (using F8 by default), in addition to dragging open windows from pane to pane (space to space), you can also drag each space to different positions by clicking and dragging the pane itself (the background the windows rest upon) overtop another space.2brI suppose this could be very useful, however it is worth noting that if you move space 1 into the position of space 2 (for example), an application set to always open on space 1 will not be reassigned to space 2. It will still open on position of space 1.The visual cue of dragging a space from one position to the next is actually visually misleading; you are really dragging all the currently open windows from one space to the next... not actually replacing one space with another.

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