I have a DLO TransPod which I connect with a cassette adapter, rather than the FM, because it sounds MUCH better than the FM route. I replaced my factory speakers, and it sounds great! I notice on their Web site that their newest model shows the new video iPod in it. Personally, I'd go for the TransPod Direct <http://www.dlodirect.com/Products/TPDirect
silverProd.tpl?command=showpage&cart=11301052045696925> because it only includes the line out and cassette adapter, and save $30 on the transmitter. If you have an AUX input in your car stereo, that's even better.
I'd wanted to install a Wire-Tunes interface in my car, but since I already have a CD changer built in, there wasn't a connector on the back of my head unit. I'd hold off, though, on buying a direct-connect iPod controller until you hear from others if they work with the 5G models. I've read that some don't.