I bought this Adapter for ipod Shuffle a few months agao & thought i would try it on the Desire & suprisingly it worked, obviously you can't adjust the volume but it lets you pause & fast forward tracks, saves having to keep turn on you phone & should save battery life
Belkin Headphone Adaptor and Remote Control for iPod: Amazon.co.uk: Electronics & Photo
Belkin Headphone Adaptor and Remote Control for iPod: Amazon.co.uk: Electronics & Photo