Knocking Live was an app reviewed on 2nd Dec 2009 that:
uses server side technology to stream and broadcast video feeds from your iPhone 3GS camera to its servers and across to the receiving iPhone into the Knocking app. Now you can send and receive live video on your iPhone from your friends anytime.
See here for a YouTube video portraying it. As it runs over 3G, it's certainly not a direct connection from host to client.
This covers all four points of the first claim. It also covers the reversal of the common paradigm (having the server initiate the stream instead of the client) described in [0009] of the summary.
The difference though is that the client of which the server has a logical link travels throughto acts as an additional server, which is arguably the chief broadcasterbroadcasting to recipient phones. Nonetheless, it covers the pointsbasic claim, leading me to suspect it's sufficient prior art to invalidate the patent.