Click on any above chatrooms and see how it works.
You will have to register the first time you enter one of the chatrooms. After that, your username should work in all the chatrooms without having to register again.
BreckChat is chatting with me.
ReporterChat is for court reporters to chat in.
TotalEclipseChat is for those on Eclipse to chat.
I may be modifying this in the future depending on how it works.