DeViLbOi's suggestion could also be used with labels for the workspaces, the only issue being no nice little window rectangles show up. You could also overlay a label on the center of each VWM, but I've done that before, and it is definitely not worth the hassle...though I might be able to script it OK w/ xLabel, if !labelCreate would work (or you could have numerous labels off-screen, and move them to the VWMs if needed...still a minor hassle)