Jeffery Zeldmen’s article about the power the iPhone has had on his work life is simply outstanding.

My iPhone has made me stop using calendar, contact, and e-mail applications I’ve used day and night for over a decade, and switch to the free — and in some ways less capable — applications that come bundled with Macintosh OS X. […] Changing years of work habits is not easy. Migrating data, in some cases by hand, takes time I don’t have to spare. Yet I’m making these changes of my own will, and happily.

I think I’ll read it again tomorrow.