There are some good katmai whitepapers appearing on the the katmai site. The list is available here http://www.microsoft.com/sql/2008/learning/whitepapers.mspx.
Performance and Scale http://www.microsoft.com/sql/techinfo/whitepapers/sql_2008_perfandscale.mspx
Manageability http://www.microsoft.com/sql/techinfo/whitepapers/sql_2008_manageability.mspx
Delivering location intelligence with spatial data http://www.microsoft.com/sql/techinfo/whitepapers/spatialdata.mspx
SQL Server 2008 Reporting Services http://www.microsoft.com/sql/techinfo/whitepapers/sql_2008_ssrs.mspx
What's new for XML in SQL Server 2008 http://www.microsoft.com/sql/techinfo/whitepapers/sql_2008_xml.mspx
Managing unstructured data http://www.microsoft.com/sql/techinfo/whitepapers/sql_2008_unstructured.mspx
Server consolidation http://www.microsoft.com/sql/techinfo/whitepapers/hosting_sql_srv_consol.mspx
Data warehousing http://www.microsoft.com/sql/techinfo/whitepapers/sql-for-datawarehousing_2008.mspx
Data Programmability http://www.microsoft.com/sql/techinfo/whitepapers/sql_2008_dp.mspx
PingBack from http://msdnrss.thecoderblogs.com/2007/10/11/katmai-whitepapers/
Benjamin Jones has this entry Katmai whitepapers There are some good katmai whitepapers appearing on
