Thanks, I've been meaning to get one of those for a while now. I was about to order this (which costs the same)
High-end iPod and iPhone Docking Connector Cable to Right Angle 3.5mm(1/8")Stereo Audio Cable

or this one with a coiled cable (not for iPhone though)
3.5-POD - PIE 3.5-POD iPod Dock to 3.5mm Adapter Cable - Accessories - Precision Interface - iPod? Adapters - iPod? Adapters - Discount Car Stereo.com - Detail

I'm cheap so if anyone has found a decent quality one for less, please let me know.