This
DVI KVM switch is designed for computer users to control four computers without redundant keyboards, mice, and monitors. The DVI KVM Switch supports a wide range of PC hardware and software platforms. It saves your money, time, space and power.
It's loaded with features such as hot-key, individual push button on the front panel, audio and auto scan control. It also has complete keyboard and mouse emulation for simultaneous PCs boot-up process.
Don't forget the necessary DVI KVM cable set.
Update 8/21/2009: Please note this item is currently on backorder due to manufacturer production delays. The 2-port version is still available and is viewable here.