There is no help text on comment settings

Issue Link: 
http://drupal.org/node/394494
criticality: 
Minor
Drupal7: 
Open
Task: 
Post some example content
This happened to: 
Participant 10
Participant 4

On the node edit form, there's no help text on the comment settings. If users are confused about what the various options do, there's nothing to help guide them to what the want.