Switched link on the first page to http://gamesurge.net/javachat
Please see instructions on page 1 of this thread if you wish to connect!
JavaChat seems to be a bit more user friendly and it also displays everyone on the channel regardless of whether they are idle or not. Mibbit would hide anyone who hadn't spoken in 5 minutes time and would make the channel appear to be empty at times.
Unless Java causes you issues, I'd recommend using it going forward.
Also, the #1 reason
people can't complete the instructions on the first page is because they are using a backslash ( \ ) instead of a forward slash ( / ). Forward slash is the one under the question mark. Make sure you're entering the commands with the correct slash. =)