PC Stats has posted a TRENDnet RK-800R 8 Port KVM 19 Rack Mountable Switch Box review

With rack mount servers in such close proximity to one another it's not feasible to have one monitor/keyboard/mouse per system. If we take a standard 42U filled to the brim with 1U servers that would require something on the order of 40 sets of monitors and keyboards/mice - which is just silly.
Long ago, companies realized there was a very big and very real requirement for rack mount KVM - Keyboard, Video, Mouse switch boxes. Intended for especially for 19 server racks, the RK-800R has little flanges which attach to the side so it can be mounted in the rack, taking up just 1U of space.

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