I think you have to use the USB. But wireless?

http://en.wikipedia.org/wiki/Wireless_USB is our launch point to see if we can find WUSB.

http://www.gefen.com/pdf/EXT-WUSB-4PIC.pdf is the unit from Gefen.
http://www.gefen.com/kvm/dproduct.jsp?prod_id=4505 is the order page.

Bob