I passed 70-432 this past Friday. Since the 2008 certifications are being retired at the end of July, it makes sense for me to skip the other 2008 exams at this point and begin working toward the 2012 certifications.
As I read the Microsoft certification site (http://www.microsoft.com/learning/en/us/mcsa-sql-certification.aspx), ONE 2008 MCTS exam (such 70-432) is adequite to take the 2012 upgrade exams (70-457, 70-458). Is that correct?