Announcing release of WP Wall.
“Wall” widget that appears in your blog’s side bar. Readers can add a quick comment about the blog as a whole, and the comment will appear in the sidebar immediately (without reloading the page).
All comments are internally handled by WordPress so that means you have normal comment moderation, SPAM protection and new comment notification.
More Info:
http://www.prelovac.com/vladimir/wordpress-plugins/wp-wall