http://zelaron.com/forum/mychat.php
I'm in the process of completely rewriting the shoutbox. The first stage is complete, which you can check out at the link above.

New features so far:

• Cleaner element positioning
• Net code doesn't stall (a feature because in the old version it did very easily)
• Last update time displayed so you can see if you're having connectivity issues
• Color
• Minimal updates reduce bandwidth usage
• Configurable font size
• Text doesn't scroll to the bottom unless you resize or someone sends a message
• Old messages remain on the box until you close it

Coming soon:

• Recent threads populated
• New archive page
• Rewrite of corner chatbox

Please check it out on all browsers available to you and post issues in this thread.