Boiler Design has a couple intriguing prototype cable-managers online: the first being a baseboard "picket fence" that forms a designy trough to run your cables along (looks like it'd be a dust-magnet, though), and the other being a nautically inspired "cleat" for your plug receptacles that you can wind your cords around when not in use (I suspect it'd be great for in-use cords too, especially vacuum cleaners, to keep the plug from being jerked out).
(Thanks, Karl!)