Help my wife use the iPhone 3G in her BMW

I am taking a lot of heat for the new iPhone 3G that I got my wife. She has Bluetooth set up in her BMW, and it works fine with her phone. Problem is, with her old phone she had keys assigned to her frequent contacts, so she could just touch a key, say, and the call would come up through her car.

Now, she has to slide on the iPhone, press the button to pop up her Favorites, and then pick from a list. Also, a quick finger touch does not always initiate the call. (She is driving, after all, when she is doing this.)

She could use the voice recognition feature of her BMW and go through each digit - a pain since now she has to include even her local area code.

I know, in the larger sense of what is going on in the world, this may seem facile to some. But her old phone did this one thing very well. Any (positive) suggestions?

Thanks,

-ddog