Is there any add ons out there to either replace this cable or lengthen it? Thanks

 

I wish I knew! I too have a problem with such a short cable. I tried using an extension cord from "Cable Jive" with no luck. They do, however, make an adapter that powers up my iPhone while it's synced (nice!) but I hate the crappy cup holder thingy! I just got a great vent-mounted cradle for the iPhone, but the @#$@^&$*&@# interface cable is just tooooooo short!
Let me know if you find anything!