JTV Chat Embed
From Justin.tv API Wiki
channel The name of the channel to chat in.
hide_chat Comma seperated list of chat types that should be hidden.
default_chat Chat type that is enabled once the page is loaded.
tweet_suffix The string that will be appended to the Tweets of users who use the Twitter chat. Useful for appending URLs.
over18 Set to 'true' if user has already confirmed they are 18 on your site.
jtv facebook myspace twitter
Chat with Myspace & FaceBook disabled
<iframe style="width:465px;height:500px;" src="http://www.justin.tv/chat/embed?channel=officecam&hide_chat=myspace,facebook&default_chat=jtv"> </iframe>