The New York Times last week provided a fascinating behind-the-scenes look at what it was like working on the original iPhone development team. Much of the article is sourced from Andy Grignon, a former Apple engineer who helped work on the wireless components for the iPhone.
Needless to say, working on the first iteration of the iPhone was an exhilarating and harrowing experience. Grignon recalls working seven days a week and relays that he gained about 50 pounds during the two or so years the original iPhone was in development.
What's particularly interesting is that the iPhone was still a wonky beta