I presume this is different from attaching a chat room to ones blog/website, since I've already covered that in my post on chat rooms.
From what bambam777 says, I understand that what's being requested is a chat room that resides directly on the blog, kinda like the shoutbox you see on the right.
Well, why have a kinda shoutbox? Just install a shoutbox and you have a chat room right there on your blog (provided you know how to modify your blog template). Here's what you do:
- Go over to oggix
- Follow instructions to register
- Get the html thingamajiggy that installs the shoutbox in your blog sidebar (er... highlight and copy the code)
- Paste it where oggix tells you
- Save changes
Drawback: Everyone can see your conversation. If you want private conversation, install a separate Sigmachat (now addonchat) chatroom and put a link to it in your blog.