Hi, I'm about trying out getting this to work with a sis based usb-vga adapter, however my biggest problem right now is to get one
I had the usb host mode stuff working, and as I'm about to rebuild my kernel for the recent update I will just try out to get the sisusb module compiled as well. If that works and it loads i will seriously do research which of the to me available usb-vga adapters actually contains a sis chip (I live in germany and all adapters I found in online stores here have noname brands and useless technical specs).

The difficult part imho would be getting X running with the sisusb driver (http://ftp.x.org/pub/X11R7.0/doc/html/sisusb.4.html), afaik the graphical interface on the n800 is not X but some framebuffer thing, I haven't looked at it yet so if anybody knows details However, if that works the rest (windowmanager and so on) sould be rather easy.
I'll post an update about the kernel module and also will gather my achievements somewhere on the web as soon as i get my fingers on some fitting hardware.