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Person viewing file www.domain.com/bluewidgets.html can chat via their browser and that file with someone viewing file www.domain.com/redwidgets.html via a separate browser and their discussion can be watched and joined via a third browser by someone viewing www.domain.com/greenwidgets.html?
[edited by: 4thePegeh at 1:15 am (utc) on Aug. 23, 2007]
Can AJAX be used to have a live site wide chat room?
Yes. Google chat accessible from gmail is an example of a similar thing. And I'm guessing there are at least two open source AJAX based IRC clients. Make a chat room just for your site, and you're done.
