Sorcha, there is 1 big drawback with the type of chat I set up and I would guess that is why its not used here. There are compatibily issues, e.g. Web TV's don't support Java, it can be harder for people behind firewalls to use, etc.

I'm not a fan of chats that use a HTTP (web) server and rely on the browser refreshing but you can guarantee that just about everyone will be able to use them. I would imagine that is why this type has been chosen for Mudcat.