I found this little guy and it looks to be a clean install for those who want to use their ipod in their vehicles with out having to use the fm modulator adaptor. This one is for newer GM trucks, but there are others for various vehicles and years. Looks like about 100 bones at Fry's, but they don't show this exact model on their website. I will call em when I get a chance next week.
Edit: It also lets you use your steering wheel controls to work the ipod and will retain xm and cd changer abilities with the correct harnesses.