I just wrote a post for The Mac Observer as part of a series on how the site’s staffers use their iPhones. (My contribution is Part III of II; you have to read it to understand.) Here’s a snippet:
One of the best things I’ve found about the iPhone is that it’s not really a separate device at all – it acts as an extension of not just my Mac at home, but of the accumulated knowledge of the human race. OK, that’s a bit hyperbolic, but that’s the way it feels. Before the iPhone came out, I wrote about the need for a “convergence device” – one that could be used away from my home Mac, but allowed me to access its power and functionality. The iPhone has very much become that convergence device for me. And that convergence has, well, converged even more over time, thanks in large part to the over-the-air synching capabilities rolled out via MobileMe and the speed of 3G networking.