some kind of RTMFP server (such as Stratus or a future version of FMS) is needed for all P2P communications, except for one special case: for an RTMFP group (group NetStream or NetGroup) where all the peers are on the same LAN, the members of the group can discover each other using IP multicast without a server. see the ActionScript documentation for NetConnection.connect() in the Flash Player 10.1 beta documentation for more information on this mode.
one-to-one P2P (direct-connection NetStream) always always requires an RTMFP server to perform peer lookups/introductions.
Is there a sample?
see the ActionScript documentation for NetConnection.connect() in the Flash Player 10.1 beta documentation
Can you provide a URL or other guidance to this documentation?
Is it part of the Flash Player 10.1 installation/download?
at the bottom, "Getting Started" tab, item #6 has "ActionScript 3.0 Reference for the Adobe Flash Platform". the direct link: