My friend and colleague Paolo Salvatori has just started a blog at http://blogs.msdn.com/paolos/ and began with a great post on Synchronous to Asynchronous Flows Without an Orchestration http://blogs.msdn.com/paolos/archive/2008/07/21/msdn-blogs.aspx.  As you'll see from the post Paolo loves to delve into technical issues and always provides comprehensive report and great source code samples to back up his findings.

I'd definitely recommend adding this blog to your feed/favourites as I can guarantee from Paolo's previous work that you will see lot's of interesting content.