I happened across this interesting article at Forbes (I generally read it weekly, but just came across this tonight) that discusses how the iPhone could be slotted down a notch by RIM's Blackberry next year (perhaps). I don't think the article takes into account the next gen iPhone being released/announced in June and potentially going to Verizon, as I'm sure Apple's market share will skyrocket for awhile after the fact, but interesting never the less. I'm sure you're all thinking I have a bias, but out of full disclosure, I'm a Blackberry man (Tour 9630); never really have found any reason to hop aboard the iPhone train for various reasons (one being AT&T). I do see the appeal of the iPhone though and really, I don't have anything against it or Apple; it's not for me. I've always had US Cellular and have never had an issue with them, i.e. service, customer support, etc...
http/blogs.forbes.com/greatspeculations/2010/03/05/iphone-could-overtake-blackberry-market-share-in-2011/
http/blogs.forbes.com/greatspeculations/2010/03/05/iphone-could-overtake-blackberry-market-share-in-2011/