Windows Workflow Foundation (WF4) provides you with client and server side capabilities for building complicated apps. In particcular, apps that require long running, asynchronous processes that can coordinate services, update data stores, and notify systems and people of outcomes.
In this Microsoft video, they cover the improvements in the next release of Windows Workflow Foundation (WF4).
The video touches on:
And much more.
The video is presented by Ron Jacobs from Microsoft.