Those who've read my past articles know that I can geek out at times; I like to . So for this year's Macworld Expo, I tried to cover the show floor using nothing but my iPhone. (Just the show floor; I used my laptop during .)

It was an interesting experiment, and one that worked well in many ways. But it also wound up highlighting the iPhone's biggest flaws.

What worked

Throughout the week, as I roamed the show floor and met with vendors, the iPhone became a virtual appendage, helping me organize my days and keep in touch with the outside world.

Of course I used the iPhone's Calendar app to keep track of my appointments--Expo events, private meetings, , speaking appearances, receptions, and, yes, parties. (The Maps app was useful for finding those parties.)