My 5 favorite iPhone apps

One of the strange rituals of life in 2010 is what I call the "Shootout at iPhone Corral." It's the moment in a conversation when two people who aren't normally given to gun-slinging unholster their iPhones for a showdown over who has the coolest apps.

To spare you that encounter, herewith are 5 apps that I find myself using all the time and that I recommend to every dueling partner.

1. Flight Status. If you travel much, you need this app. It's usually more up-to-date than the status boards in ...