This is great news.
I installed xserver-xephyr on the debian chroot, then started xephyr in fullscreen as display :1.
Then in the Debian prompt exported display to :1
Then started xfce4-session.

Ta-dah! Full screen xfce4 (with abiword, openoffice and all the band) along with hildon-matchbox and those other odd things. Two worlds together! I am verrrrry happy :-)

Now I need a new 8gigs transflash. The one I had from Sandisk was fridged by the tablet and I was never able to restore it. My present 6gigs has become insufficient for that debianosaurus.