NEW: SQL Server 2008 R2 content

• SQL Server 2008 R2 Upgrade Technical Reference Guide:   This document covers the essential phases and steps to upgrade existing instances of SQL Server 2000 and 2005 to SQL Server 2008 R2 by using best practices
• SQL Server 2008 R2 Security Best Practice White Paper: Security is a crucial part of any mission-critical application. This paper describes best practices for setting up and maintaining security in SQL Server 2008 R2