Looking for a single place to go to learn about what’s new in WCF and WF in .NET 4?

We just published a couple of new articles that should help:

These articles are meant to be overviews of the most important new features and improvements in WCF and WF, with enough technical detail and code to help you as a developer understand how to use them. 

We will update these articles over time to reflect any changes in the Beta2 and final release versions.