I presented "A Guiided Tour ofWCF" talk at the Southern California Rock 'n' Roll Code Camp last weekend. There was a good turnout and a lot of interest in WCF. In addition to my overview talk, Michele Bustamante presented three talks on WCF particulars, including one on security.
 
Here's a like to my slide deck for those interested. The code examples are also available, which are largely updated examples from my book, Programming Indigo.