Ah! Here are my recent experiences tweaking the XFCE desktop. What we get out of the box is not quite ideal, since it is not a full xfce4-session. Indeed, xfce session is not actually running (which I think contributes to some of the instability). I installed GDM because I want to play with a few different desktops on here. This way I could also select that I wanted to log in to a real XFCE 4 session, with xfwm and everything!
There is probably a better way, but I'm a wimp and like my GUIs

If you do this, make sure you reconfigure gdm because by default it works in a way that renders the touch screen unusable. This means you will find yourself with an astoundingly useless system thanks to our limited hardware keyboard and will need to edit config files from a different operating system. (Next-gen accessibility: System should work at least well enough to launch a terminal with arbitrary few keyboard keys out of the box).
The GNOME for debian beta 4 thread covers how to reconfigure GDM, and is probably worth keeping as a reference since xfce and GNOME do share quite a bit.

After doing this, I was very pleased. First of all, it is now dead easy to overcome that 'windows too big for the screen' thing. By default, this requires the Alt modifier key. However, you can go into the settings manager, open Window Manager Tweaks. It now works (I notice the default session runs Matchbox, which XFCE did not like -- although it too overcomes that too big windows issue thanks to its dead cool function for dragging windows anywhere they aren't listening for events).
Sorry about the rambling. Okay, in the window manager tweaks dialog, go to Accessibility. Here you can change the modifier key used to perform fancy window operations. I used Ctrl, since I don't think I ctrl click very often. (Chr would have been a better sacrifice. Too tired to check... does it map to anything?)

Extra bonus: You can turn on window compositing! Impress your friends now with drop shadows and semi-opaque dialogs!

Edit:
Oho, Chr maps to Alt! That sure renders me irrelevent. Well, I guess there is only one point left to this post then... you can do compositing