Go to the home store; Menards, Home Depot, Lowes, etc... and pick up some peg board and some pegs. They usually come in 4 X 8 sheets and they're real easy to cut up. Pick up a few 2 X 2's (8 feet long) and some screws. Cut the peg board to the size of your liking and around the perimeter of it screw the 2 X 2's. Then find a place on one of your walls to secure it up in place, and there ya go, you've got a whole plethora of possibilities for organzing cords. I'm planning on doing this in the small room between my live room and the control room. I've got some drywall attached directly to OSB, so that'll work great for attaching the peg board.
I like this idea because you're not limited to anything some manufacturer made. You can put the pegs on there however you'd like to accomodate your exact needs. You can even paint the peg board any color you want... like the color of your walls, and it'll look great.