RTMFP is awesome, I wrote this article when the beta had just been announced so I did not know much about RTMFP then.. Justin started talking about the details of RTMFP and the Peer to Peer abilities on his blog a few days after this announcement. Thanks for pointing it out though

If anyone else is wondering what this is about, check out Justin’s posts of the subject ..

RTMFP in Flash Player 10 beta
Peer to Peer (P2P) in Flash Player 10 beta

I guess you are missing the more important feature of Flash 10 in the list above. Probably that’s because you are looking at the release more from a designer viewpoint. As for me, one of the key features of this release in addition to the above is support for semi-P2P applications using RTMFP (Real Time Media Flow Control) protocol. That opens up a whole lot of possibilities including something like VoIP call using flash 10 and interactive multplayer games, etc. Though its still to early to predict how it will evolve and how much it would be accepted.