The iPhone is a great device, but it's NOT for everyone; in particular, it is NOT a productivity device, so anyone looking for that sort of thing will be sorely disappointed. A good friend of mine is a HUGE Apple fanboy, and he's returning his because it slows him down too much (he likes his 32GB iPod, although he thinks the iPhone is a better iPod device - just not enough memory). He also earns well into the six figures, so it's anything but a matter of price.
In general, I think anyone coming from a feature phone will be THRILLED, but that anyone who needs the productivity features of the BB or Treo will be unhappy to find out that iPhone doesn't fit the bill (unhappy because they love the design, etc.)
Marc
p.s. Am I the only one that doesn't love the web browsing on many sites? For news, I much prefer pages designed for PDA's; most of what's on a newspaper page is ads indexes, etc. that are a waste of time to wade through.