A few months back,
Kirk Evans and I were wondering out loud what Don Box might keep himself busy on now that he's conquered the Web stack. Given Don's communication on Workflow Foundation and continuations, I wondered if he might be working on moving the new threading model people in Microsoft Research had cooked up into the CLR and/or C#. It's interesting that Don
linked to a blog entry by CLR program manager Joe Duffy that
suggests just that. Don's entry doesn't really hint at it though. It would seem odd for WF itself to be pulled into the language.