It looks like you're new here. If you want to get involved, click one of these buttons!
Bit of a plug for a friend, he has developed a new Live Chat platform called Live Support Rhino. Take a look, see what you think.
Load up the operator panel in 1 window, and the customer panel in another and give it a try.
Personally I don't use it, as I don't have a need. However he has done some good work so far, it's certainly usable with some good features, and more to add over time.