Baldy18
The current belkin USB KVMs do not allow you to use a USB keyboard or mouse.
Go figure.
They may save you a few buck on cables though.
I researched KVMs a lot before purchasing my belkin and at the time I decided against USB as Belkins implementation is whaked and I had read a bad review or two about the IOGEAR/Alten USB options (they are more like a USB hub shared between computers, which in theory is fine but can cause problems).
As an owner of an "E" series belkin, I doubt I would go with a belkin "E" series or SOHO series again.
The darn box beeps very loudly when I switch computers (annoying in my family room) and once in a while I "loose" the mouse.
I followed their recomendations and went back to generic 98 drivers for my intellimouse exporer, lost most of the features I payed extra for, things are better but I still loose the mouse or even the keyboard; rebooting is the only cure.