Interesting insight into the development process for the iPhone.

For several months, Mr. Christie made twice-monthly presentations to Mr. Jobs in a windowless meeting room on the second floor of Apple's Cupertino, Calif., headquarters. Only a handful of employees had access to the room; cleaning people weren't allowed in.

The day after Mr. Christie's team finally impressed Mr. Jobs with its vision of the iPhone software, it had to repeat the presentation for Bill Campbell, an Apple director and close Jobs confidant. Mr. Christie recalled Mr. Campbell saying the phone would be better than the original Mac.

High praise indeed. He was right too.