On the home page, scroll allllll the way down. Do you see a box-looking widget?
That is the chatbox; click the little "log in" link in its upper right corner to use it.

If I see things getting ugly in the chat, I will remove it indefinitely. It is a privilege, not a right, savvy?

If you have trouble with it, let me know, and I'll see if I can do anything to help.
Happy gabbing!