Griffin's TuneFlex solves a problem: the iPod Touch and iPhone's lack of physical controls, which matter when attention is best given to the road ahead. A base unit plugs into the ciggie lighter and the stereo's auxiliary input, while a remote control (play/pause, FF and rewind) attaches to the steering wheel.
It works well enough, with two minor drawbacks. First, it's big and cumbersome enough that you might want to not bother with the steering attachment, and just leave it knocking about in the console. Second, the base station caused en error to popup on our first-gen iPhone, which complained that it wasn't compatible. It worked perfectly, however, after the warning was dismissed. Apart from that, it's perfect.
It's also compatible with normal iPods, should you just want a fancy recharching mount or remote.
At $80, though, it seems expensive given what little it does, even if it does it very well.
Product Page [Griffin]