A member called RIDAX used to offer modifications to the iPod docking stations that would allow the DIN connection to send TAPE commands to the iPod to affect track changes etc
But this was a custom service, not an off the store shelf offering ...
At the back of my mind is a memory of a discussion about some similar offerings from European (German maybe) manufacturers
Try searching the forum for RIDAX and IPOD and see what you find
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*