for those of you that have a car with old stereos (like me lol). i just got this today. it works really well. better than an iTrip cause it uses its own power source (longer play time). they have others there too. take a look.
http://www.geeks.com/details.asp?invtid=WL1805&cat=MP3
http://www.geeks.com/details.asp?invtid=WL1805&cat=MP3