Update: Read the comments to the item marked as the answer below for the full answer.
I am implementing a Like button from Facebook per this document: http://developers.facebook.com/docs/reference/plugins/like
I am using the XFBML version so that users can add comments when they click on the Like button. I have imported the Facebook JavaScript SDK an am using a valid App ID. The button appears and I am able to "Like" the page, but I am never prompted for comments.
Is anybody else running into these issues? Anybody know of a fix?