Dan´s Data has posted a review on the Master View CD-102U USB KVM Switch.
Most KVM switches are much the same. One set of connectors for the mouse, monitor and keyboard, two or more sets of input connectors, mechanical or electronic switching.Read more
This one, though, is different. The CS-102U doesn´t bother with those old-fashioned mouse and keyboard interfaces - it uses, as the name suggests, USB. It´s essentially a video switcher grafted on to a simultaneously switched two port USB hub. Into those two ports you can plug a USB mouse and keyboard, more USB hubs, or as many USB devices as you like up to the rather implausible USB device limit of 127 devices.