Microsoft Exam 70-446, gave the opportunity to get MCITP status with Microsoft Business Intelligence stack. This built on the achievement of 70-445, which gave a MCTS. On searching around for the latest information on SQL Server 2008, I stumbled across this very useful PowerPoint from Microsoft, which outlines the Certification routes for 2008.
You may notice that there is no information on a equivalent for 70-446 as yet, which means for BI developers, that want the MCITP, getting 70-446 is still the only way forward. It looks like these exams will be available from August, and possible at a discount rate to get some people taking them.