I updated the wiki and added the two new FCP2 messages. I flagged them with "Coming soon", and I will change this into the true node released that contains the new messages as soon as it is available to the public.
Using the documentation in the wiki client developers could now start to adapt their code to exploit the new messages. But even unchanged existing apps that ignore unknown messages will have no problems with the new messages. No functionality changed for them... See http://wiki.freenetproject.org/FreenetFCPSpec2Point0
