Ok.  So I am a glutton for punishment.  I just finish writing a chapter on the Logging Application Block and was starting to research some new topics.  Now I have agreed to write a chapter on the Cryptography Application Block.  Hopefully with the experience of the first one under my belt this one will go a little faster.  I need to get cranking so that the book can meet the July publishing date.  Stay tuned and see how things turn out.