Live2Support offers one additional chat operator FREE in silver package. live2support.com/...
This service should be much higher on the list. They provide great info on your customers, and work really well with Adium on the Mac. Top notch customer service as well.
dashboard and mobile app support is awesome
If you like all of the above live chat software solutions you will be sure to like www.heybubble.com it is a free service, that features 4 customizable chat interfaces, monitoring in real time, and a non intrusive embedded chat window, that follows your visitor from page to page on your website. www.heybubble.com it is free, and is making changes to customer service experiences.
this works especially well for small businesses who simply want a no-hassle, great-to-use live chat system
I am going with Zopim for my chat platform as well. Excellent features and a great team cumult.com
In terms of backoffice support - the best choice available.
nice tool