I have a prepaid from T-Mobile. A hundred bucks gets you 1,000 minutes that expire after 1 year. While the iPhone and Android are awesome, I don't really talk on the phone very much (was averaging 76 minutes a month) and would rather avoid monthly fees. I guess I'm cheap. I do have an iPod touch, which gets me many of the benefits of having an iPhone, but without the monthly fee. Most of the places I hang out have wifi and I save content for offline reading w/ Instapaper for bus trips.