My car's handsfree system rocks with the iPhone. Does that count? I love it! Other than that, I use a crappy motorola bluetooth earpiece thing... it works, but it's not as spiffy as some of the other ones.
I didn't know that any state had passed a law like that yet. I think it's a fantastic idea...some of us may be able to multitask and include driving well somewhere in that list, but it would be much better to not allow those that seem to lack the ability.