Zeimax (TM) Adapter Converter 8 Pin to 30pin for Apple Iphone 5, Ipod 5 Nano 7th Gen USA
This product was exactly what I was wanting,but didn't work with my devices.  Not sure if that was because of the product itself or my devices just weren't compatible - Altech Lansing radio/speaker/ipad/iphone player and 7th generation nano ipod.  Oh well - it was worth the try.