Mudnuts changed it to a broken chat of some sort, Mibbit doesn't work with the current server, the old Java client was changed forever ago for some reason by Mudnut.
Hope that answers everything. If you guys don't want to download a few megabyte plugin, that's fine. I planned on using Java instead but I'm having issues with it. If I can get it sorted out, the chat applet will go back to being Java, but I'm more trying to resolve current bugs than focus on porting it back to Java where it had more problems.
I will keep you guys updated, though, seeing as how Mudnut has practically abandoned us.