EDIT: Disclaimer: I am using Display Fusion and mDesktop together.

As I have a lot of windows opened most of the time, I really love the virtual desktops of XFree. Though there are programs for Windows as well (like mDesktop), they may have bad interoperability with DisplayFusion.
Once, I lost the Windows of my programs. I could not get them on any of the virtual desktops, at alt+tab they were not shown and even the restart of mdesktop and (IIRC) displayfusion did not resolve the problem.
Lucky me, I had saved all my work and could stop the processes the hard way.

My wish (next christmas's coming soon) is the addition of virtual desktops in Display Fusion.

Heiko

I'll second that motion! I use Dexpot now but I would like for displayfusion to be able to control each desktops wallpaper as it already does a phenomenal job of that as is.