If you are asking why isn't Workflow Foundation known as WWF, it is because it is registerd (I think) and used by World Wildlife Fund (legally as World Wide Fund For Nature). It is definitely not used in any sports, by that I mean, wrestling.
Likewise to the new post written for WPF, here are some resources you can count on.
1. Introduction and Overview: http://www.microsoft.com/net/WindowsWorkflowFoundation.aspx
2. WF on MSDN Library: http://msdn.microsoft.com/en-us/netframework/aa663328.aspx?PHPSESSID=b71095e8822903c8cb9db2e870f037e7
3. WF on NetFX3.com: http://netfx3.com/content/WFHome.aspx