This past week, we announced "Oslo" at the SOA-BP conference in Redmond. Oslo is the code name for a group of technical investments we're making over the next couple of years to simplify designing, building and managing composite applications. This is what I've been working on since we shipped WCF and WF in the .NET Framework 3.0. I'm specifically working on the Rules features we're adding in the next version of the .NET Framework and on the Activities we will ship in the .NET Framework.
Read more about Oslo here.