Most I've heard about it was that Apple may be testing it. It's all rumors though, as everything is kept in the dark.
The telling bit of information would be if Apple did in fact have Sprint towers put up. I've not seen if that has been confirmed or not yet.
I love my iPhone and definitely love it more than my old Blackberry. It does some things differently, but it is a different experience. Many people have qualms with the iPhone not having a physical keyboard, but I've always been one that preferred a touch screen over a keyboard. The iPhone's keyboard is great, and after some use you are very used to it. (I became accustomed to the iPhone keyboard faster than my BB Storm.)
If you love apps, Apple has a ton, and there are even more if you jailbreak. Not to mention, the phone just looks cool