If the mixture of the word 'nullable', question marks, and C# are interesting to you then you you might want to check out the blogs of a couple of my peers: Peter (C# Compiler Dev lead) and Luca (C# Compiler PM). They've started posting on their blogs again after a decent break and it's all about Nullable at this point.

Peter posts his thoughts on a suggestion submitted to us via MSDN Feedback and Luca kicks off a series of posts answering some common questions folks have had about some the design choices made on Nullable.