bob before you go spending money on script could i suggest a program i use it is called paltalk and you can do voice and text chat, all you have to do is create a personalized room tell everyone where to go and whala it is free and simple to use with file sharing etc..
the addy is www.paltalk.com you could just put a link on your page next to your chat message if you are interested
mike
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Many go fishing all their lives without knowing that it is not fish they are after.
- Henry David Thoreau