Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.
This past Tuesday I did a small presentation on WCF at PDANUG. Here are the files from that presentation.
Remember to sign up with PDANUG for information on events or subscribe to the RSS Feed.
Saurah Gupta published an article comparing WCF with existing Distributed Communication Technologies.
There are also a article on WF performance here.