I heard it from collegues who went to the PDC a couple of weeks ago. But I heard it myself at the BPI & Workflow conference earlier this october. The new workflow designer that Workflow Foundation features will substitute the good ol’ orchestration designer in BizTalk vNext. This means that in the near future BizTalk Server and Workflow Foundation will grow to each other and will make a very strong team in delivering high available and reliable business solution. If only I could fastforward a couple of years!