This is very interesting. However, if the output stream is a key/value pair, I wonder how this type of system will compare to the one built on Erlang? If I have time, Erlang is definitely the next language I want to learn (ok, aside from data languages)
Hurray for the Enterprise Library developers! Always a big fan of your work.
Watch the video here: http://channel9.msdn.com/posts/Autoscaling-Windows-Azure-applications