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There is a facebook chat room system called Savorchat, www.savorchat.com which works as an iframe (you need to get the widget code, and find the url) but I think you're talking more about an IM system... and the answer is yes. Definitely something we are working towards.
To achieve this, we first need to create a member system (working on it!) once we have that in place, we will be able to do IM... (www.toksta.com) or cometchat.com...
So, it is part of the plan for sure.