RealClearPolitics has its usual insightful commentary on the Edwards pick:

The Edwards pick is a poll-driven mistake. At the end of the day they probably kept coming back to all of their internal polls showing Edwards giving them a bigger bump than all of the other possibilities. Don’t get me wrong, Edwards is not a disastrous choice. The press is going to love it, and there is no question he will bring a youthful vibrancy and vigor to the Kerry campaign.