How can I share message classes across applications when using NServiceBus?

It may not be the answer you want but there are very few silver bullets here.

As suggested by Juval Lowy in Programming . NET Components, separate pure interfaces in their own shared DLL.

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.