How did I miss this? I’ve linked to Church of the Customer blog for some time, but recently stumbled across the photo album from their 2003 Customer Evanglism University.
Here, in pictoral form, is their 6 tenents to building customer evangelism.
Here are two of my favorites, on "Community" and "Message Smog":
The diagram at the bottom of this is a good add on to the Word-of-Mouth Company principle.