EXTRA INTERACTION: tagboard

Just like with the comment box, you have to import the tagboard from outside, copy the code and paste it into the template according to instructions. There are many different skins and templates to choose from. A tagboard allows visitors to leave a comment unrelated to the posts, and it is immediately visible on the front page unlike guestbooks which you have to click on.

Active Topic : http://www.activetopic.com/ also offers you a script which allows you to see the number of users online browsing your page