We offer both a member chat solution and a private chat solution which can be used for member chats as well (it really just depends on what way you want to go with things).
Our member chat solution is here:
http://www.camshowwidget.com
Our private chat solution is a chat embed script that a model can grab when she becomes a model on our network. For an example please go here:
http://femmefetish.com/privateshows.php