Do you need to make a decision around building a composite smart client today. Check out this blog entry by the Acropolis team that discusses thier current strategy. Acropolis Team Blog : A new phase for the Acropolis project

If you have are confused between whether to use Biztalk or WF for your project the decision just got easier. Check out Paul's blog for more info. Paul Andrew : Just Released: BizTalk Server 2006 extensions for Windows Workflow Foundation SDK