Released: BizTalk Server 2006 extentions for WF
Just released (oh well, a couple of months ago), the long awaited BizTalk Server 2006 extensions for Windows Workflow Foundation SDK. Use WF modeling and host workflows in BizTalk Server. Note the BTS messaging activities in the image.
The new BizTalk Server edition will most likely sport the Workflow Designer instead of the plain old Orchestration Designer. This probably results into something that looks a lot like what you get with the extentions.