Spaces and Expose Overview using the 2nd Monitor

I have two monitors, and 9 (3x3) virtual desktops. When I invoke the Spaces overview mode of expose, everything gets pulled onto the primary display. It creates one overview with 3x3 desktops, although each desktop is a weird shape of two rectangles touching and offset, representing the two monitors. I would much prefer to have both desktops used for this view, with a 3x3 display of the primary spaces on the primary display, and a 2nd 3x3 display of the secondary desktops on the second display. Does anyone know of a defaults command or 3rd party app that supports this?