Unfortunately I'm in the same boat, going to go back and do 70-450 in a couple of weeks if I can find the funds, failed it twice now with a score of 624 each time.

I've been using the MOAC books along with SQL Server 2008 Administration - Real World Skills For MCITP Certification And Beyond and Transcenders but still no luck.

If you have been using other media please let me know and I will most certainly have a look.