how does it work - is it possible to have separate vga devices and
separate X-servers started on it.

i'm thinking about cheap (but effective) terminal system for home/small
office.

one PeeCee, many video cards (one AGP, up to 4-5 PCI) with one or two
monitor output, USB, long monitor cables (standard ISB is up to 5m,
shouldn't be problem to make custom 15-20m , same with monitors), many USB
keyboards and mice.