I will take Microsoft SQL 2008 Beta Exam 71-450 (Microsoft SQL Server 2008, Designing, Optimizing, and Maintaining a Database Administrative Solution) this weekend.
This exam counts as credit towards the MCITP: Database Administrator 2008. Register the exam at Prometric testing centers and can be taken between 18 Aug and 16 Sept 2008. When registering for this exam, enter the promotional code: 239F4 to take the exam free of charge.
Here is the list of documents and resources for Microsoft SQL Server 2008.
I will post again when I get my results.