iPod your BMW

One of the reasons I bought my iPod earlier this year was so I could connect it to my 2004 BMW 330i. Adding the jack to the radio (it works on an AUX setting), was easy enough. A $35 part and $100 worth of labor later, I had the jack installed. I've been using it for several months and it works wonderfully. The iPod holds hours worth of battery charge -- long enough for my longest road trip so far -- and I can go hours without it repeating the same song while on random play.
 
However, I've noticed the new ads out promoting this and they are connecting their iPod with a different cable that apparently charges the iPod and gives you use of the audio controls on the steering wheel. I was also told that I couildn't connect the iPod to my 2002 Z4 Roadster. The iPod Your BMW web site, however, says you can. I'm going to give Scott a call and find out what's up.