Media Decor Try This:

http://cableorganizer.com/surface-raceways/

Kayron Brewer, CKD, CBD / Studio K B Ah! good one. Well, this photo was taken right when the client moved into the house and the computer was quickly put together and little details like hiding the cable was not done yet. I was not actually planning on photographing this room, but decided to at last minute, which is why you see the lovely shot of all those cords!
Well, I would either use a cable organizer or build an "L" shape channel out of cabinetry solid stock under the desk area, up against the wall. That channel could also be designed so it creates a cleat for countertop support.