Sewell Direct has it for a couple hundies off: http://sewelldirect.com/gefen-ultra-kvm-extender-dvi3000.a... I could see this being useful for a campus, business, or trade show. But Gefen's site says it's useful for separating you from your noisy computer. Your computer best be REALLY noisy to justify a 6 mile buffer.

I think Gefen means really separating . . . like perhaps in sound studios? Kind of bizarre marketing, I agree, as I think Gefen sells much more down-to-earth DVI extenders. (Once you're on fiber optic, six feet could easily be six miles, but there are cheaper short-distance extenders.)

this is more for a commercial application. For example, my company would use something like this to take video of Bill Gates keynote speech at something like E3 and use this box to send it from the room it originates in to a room across the conference center for overflow seating. That way you only need to run 1 cable for video/audio. This type of thing has been around for years using cat5 cable, but this is the first I've seen using fiber optic cable.

Fibre optics tend to be used where long distances are involved or where copper is unsuitable. This would be ideal for installation in sealed devices to be used in mining for instance, as theres no spark risk with fibre optic cabling. It could also be used to control onboard computers in a robitic setting with a long umbilical connection. I could see it being used for computerised machinery control in industrial environments. Differences in potential between buildings, or cabling running past heavy electrical machinery, make copper cabling difficult to use due to magnetically induced or earth leakage currents. Fibre doesnt suffer the same problems.