devil_fingers (famed contributor to both my site and Beyond the Box Score) makes an excellent post detailing the concept of walk rates, defense, and the impact they both have on a player's individual worth.
Endy Chavez = Adam Dunn? It's more likely than you think!
Remember a few years ago when the A's shifted towards acquiring top-notch defenders after OBP was determined to be "life?" You see more and more teams going to the three CF alignment in the outfield (Remember Bradley, Payton, Kotsay?) like the Mariners (Chavez, Gutierrez, Ichiro) and the Rays (Crawford, Upton, Joyce).