Ofc it's feasible. The question is WHY would someone do it 
Why? Because it would be easy to throw in, not as easy as the IDE port on the X-Surf, but similar idea. With a full speed USB 2.0 port built in, you could boot from a small CF, then run your hard disk, DVDROM, even network, off USB. Speaking of which, how are you going to interface your CDROM when using the new accels coming out?
