WCF Security Guide - Formal beta now available

From the post: "Welcome to the patterns & practices Improving Web Services Security: Scenarios and Implementation Guidance for WCF project site! This guide shows you how to make the most of WCF (Windows Communication Foundation). With end-to-end application scenarios, it shows you how to design and implement authentication and authorization in WCF. Learn how to improve the security of your WCF services through prescriptive guidance including guidelines, Q&A, practices at a glance, and step-by-step how tos."