There are plenty of social networking websites today where you can find dynamic Ajax-based comments. This system is more usable because you don't need to refresh the page every time you post something new. However setting up a whole database for user comments from scratch can be difficult.
In this tutorial I want to look at using jQuery just for animating custom comments. The form will submit each post anonymously and won't save anything to a local database. The effects are only for show - but you can easily adopt the dynamic code into a system such as Wordpress, vBulletin, Joomla!, or even your own custom backend.