Entity Framework, WCF, Clients, and Object Context questions?

Your question is too complex. This kind of questions usually doesn't have satisfying answer because it is too open ended and it also requires much deeper analysis of your requirements.

Your idea of using a publish/subscribe model is good. However you don't need to constantly pull data.

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.