MEF certifications recommendations?

Hi all, As our organization has matured, we've discovered the joy of speaking the same carrier ethernet languages as our vendors and as such we're going through a process of aligning our service-offerings with MEF-centric terminology. Anyone out there taken any MEF-certification training programs and had a good enough experience to recommend one to us? I'm looking for two types of training-- one for the customer-facing folks and one for the engineering folks. We're in Seattle, so local recommendations or nationally-know recommendations are preferred. Thanks, Dan