Luca is our uber cool C# compiler program manager. He gets to do cool stuff, such as sit in on language design meetings, think and plan the future of the compiler, chat with Anders Hejlsberg etc etc. He recently started blogging on various aspects of the compiler here: http://weblogs.asp.net/lucabol. His last to last post explains some parts of the Nullable construct in the C# compiler...

Shaykat