WCF+ORCAS Videos
JSON and WCF
https://channel9.msdn.com/ShowPost.aspx?PostID=339131#339131
WCF related videos
https://channel9.msdn.com/tags/WCF
orcas tooling
https://channel9.msdn.com/Showpost.aspx?postid=335756
If you know any good videos on WCF orcas features, please let me know, I will update my list