<< If you use video chat in Gmail, you might be interested in a new Labs feature we just rolled out that allows you to preview new video chat features before they're turned on for everyone. Visit the Gmail Labs tab under Settings, turn on "Video chat enhancements," and right away, you'll see higher resolution video and a bigger video chat window. >>

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http://gmailblog.blogspot.com/2010/09/new-in-labs-video-chat-enhancements.html