I'm attempting to migrate my profile from Prometric to Pearson at the moment (rather late, I know). I purchased the SCJD assignment from Prometric late December 2010.
For my situation, Oracle's Vendor Transitioning FAQ states that I should first "Contact firstname.lastname@example.org to exchange your voucher(s) for voucher(s) that can be applied to the Assignment at Pearson VUE". Simple enough, but I'm not quite sure what it means by my "voucher". However, I'm sure that the knowledgeable people of these excellent forums can clear this up for me.