I had compiled in scratchbox and installed the modules on my N800(needed libwrap and libsysfs also), with my Linux desktop serving as the USBIP Server. Am able to list and attach the remote usb device on my N800. Havent played around with it much more though or checked the error with the usb.ids.
This makes my "N8x0 as USB server" even more attractive to me. If someone can get the usbip server working on the N8x0 tablets and the client working on the N900, the n8x0 could easily share usb ports over wifi with the n900...