This morning I passed my next exam, 70-455. This exam is the upgrade to SQL Server 2008 for existing MCITP BI professionals on SQL Server 2005. The exam's corresponding study guide can be found here:
http://www.microsoft.com/learning/en/us/exams/70-455.aspx
The exam provides 'scaled-down' versions of both the SQL Server 2008 TS/TP exams.