I used to think I was an early adopter. But then then iPhone hit, and I just couldn't feel the hype. I had to go into my local Apple Store today to have an iPod fixed, and discovered that Apple had plenty of iPhones on hand (to try and to buy). So, I gave it a spin.

- It's not very easy to type on this thing, whatever Mossberg may tell you. It's just not.
- It doesn't fundamentally change the value proposition of a phone/PDA combo.
On this first point, I suppose one could get used to hitting a screen and, if Steve Jobs is to be believed, eventually we all will. Why? Well, because Mr. Jobs tells us to. (I'm a diehard Mac fanatic, so I've been convinced by him before against my will. :-)
But it's the second point that has me sticking with my Blackberry (after years of using a Treo and recently switching to the Berry). I love my Blackberry. It's not as pretty as the iPhone, but it's so intuitive in other ways (e.g., little touches like clicking to call the sender of an email) that I can't think of a single reason to leave it.

If anything, I'd leave my Blackberry 8700 for the Blackberry Curve (8300). Thinner and lighter than my existing Blackberry, the only thing it lacks is the scroll wheel (to which I've become addicted).
Again, it's not that the iPhone is a bad device. It is an excellent device. It's just not better, and in some ways it's worse, than what I (and perhaps you) already have. When I switched to the Mac back in 2002, it was because it was dramatically better than my Windows (and Linux) machines.
The iPhone doesn't present the same justification. I don't spend $500 on a cool but needless toy.The Blackberry is not broken, therefore I won't be fixing it.