"Microsoft SQL Server 2008 Administration for Oracle DBAs" aimed at experienced Oracle DBAs that want to use their existing Oracle knowledge as a springboard to learning SQL Server is now available on Amazon.
""Microsoft SQL Server 2008 Administration for Oracle DBAs" shows you how to use your experience as an Oracle DBA to get up to speed quickly on the Microsoft SQL Server platform. Authors with real-world expertise in both Oracle and SQL Server introduce you to fundamental concepts, such as SQL Server architecture and core administration, before guiding you through advanced techniques, including performance optimization, high availability and disaster recovery. Platform comparisons, on-the-job examples, and answers to questions raised by Oracle DBAs learning the SQL Server environment help build your skills."
More Info: Amazon