You Can Implement TCP hole Punching that will allow two peer to communicate behind fire wall. First go through this link http://www.brynosaurus.com/pub/net/p2pnat.
If you search for a UDP-based message-oriented protocol, I'd consider TeleHash. There are also Java libraries available.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.