I have both phones as well, and carry both, and while I agree with just about everything the OP posted, I still find myself reaching for my iPhone more often. For example, the camera is too often too slow in snapping a pic, and I have a devil of a time getting it to show in the picture gallery. I often have to go into file manager to find it. Sometimes when a call comes in, it's stuck in sleep mode and takes so long to become responsive that I sometimes miss the call. If I'm in a place I am not familiar with and want to find a restaurant or a Kinkos or whatever, the iPhone will find my location quickly and light up what I'm searching for.

Then there's the email app.... Arrgh, iPhone blows it away.

So yeah, technically the N900 is miles ahead and I'm thoroughly enjoying having root access to it and doing neat things, but for the average person for everyday use, the iPhone just works. i.e., my wife has an iPhone and I'd never dream of telling her she should get an N900 instead.