Flash version: 8, ActionScript 2.0.
Uses internal emoticons, so theres no need for external images. Easily modify the source to include any images and change the history display as you like.
No setting up required. Just add it to your page. The Post-IT image is transparent, so apply any background color or image that suits your site. All the modules are dynamically created in actionscript, so editing it's appearance and changing the animation type and speed is very easy.
All message info is stored in a text file rather than a database in the same directory as the application. A simple approach, but a great way to interact with customers or visitors on your site.
The only external setting is for the history (how many messages you will see upon entering the site), and it is located in the PHP file used for variable loading, reading and writing to the text file.