The Cordster headphone cable tidy. $4.95 for a pretty neat idea, elegantly done and in gadget friendly colours. Tangles is like so yesterday, dude. [Thanks Jamie]
Works well with virtually all portable cords, thin and sleek, less than 7mm deep, snaps easily on and off using tough, removable Velcro-like fastener.
I just bought a Cordster and it is sooo cool. I was sick to death of untangling my headphones every time and this is one of the those stupidly simple little inventions that actually works. It ROCKS!