I have a Kenwood with usb connection and it's not a good setup for an ipod/iphone. It treats the ipod as a hard drive and access the files off of it. The problem is that the filenames of the songs are all garbled and there is no playlist support so unless you plan on keeping it random, I wouldn't bother upgrading.
I'm having the same problem as everyone else. The belkin was perfect. I don't need the extra controls and I liked its simplicity. Hopefully they will update with a newer version. Anyone found any other solutions like this?