A couple of downloads to try, if you’re missing VirtueDesktops in Leopard.
Is it possible to specify a different background picture for each Space? I used to like that feature when I was using Desktop Manager and I miss having it.
The fifth beta release of You Control: Desktops 1.3 is now available. This update includes a number of Leopard compatibility fixes in addition to ongoing fixes and enhancements for both Tiger and Leopard.