I agree, xfce4 is good and I already tried it in m001, it works well, but needs more resources than lxde. May be with more optimized base system it would be good. Have anybody tried to port emdebian? I was looking for some other window managers, but matchbox is probably the best solution for touchscreen operation. I tried to install some GPE programs, which are based on matchbox, and they are really good and optimized for touch operation. They need some additional configuration to be perfect.