The way I read the tea leaves is there will be no .NET Workflow services component in future CTPs or the release version. .NET Workflow services will be reinstated some (undetermined) time after MSFT RTMs the new Workflow services in .NET 4.0.
I've seen no evidence of the purported "consistent discussion is the Microsoft .NET Workflow Service delivered via .NET Services, and how it relates to the Windows Workflow Foundation (WF) in the .NET Framework." Nor have I heard "One of the comments that we’ve consistently heard about the .NET Workflow Service is that you want the Workflow Service to be built on .NET Framework 4‘s workflow engine." I certainly haven't encountered requests to remove Workflow services until the .NET 4.0 version is available.
--rj
OakLeaf Blog