I used PJIRC on my site, Though I stopped using it because my visitors were having problems with Ident etc.
So what I did was, Remove the Java applet and tell people to use a real client. Java chat itself is fine but I wouldn't advise trying to put inexperienced users on to public IRC using PJIRC.
It's better to pay for a system that uses a private server, Maybe not even IRC protocol. Otherwise you will be dealing with complaints about YOUR chat applet and YOUR site not working properly. When all they are experiencing is the common IRC problems. Common IRC connection problems are a pain for the user who simply click the "

Chat Now!

" button, It implies user friendliness that IRC can't really honour.
For IRC it's better for people to use a
"real
" client such as mIRC that has support forums, And a detailed FAQ and Readme. As IRC really is not ideal for the technical newbie. And the experienced IRC'er would not be using a Java applet as a preference
