Here's a group who's documenting their creation of an industry certification program through a blog. This one's pretty basic, but the possibilities are endless. What a great way to be transparent (and informative) with members of a profession about the development process...and I could see how there would be easy opportunities for engaging and seeking input along the way.
I've actually now found 6 blogs sponsored by certifying agencies (plus many more by candidates/certificants). I've also found several social networking groups of certified individuals and/or applicants...and several videos on YouTube. Certifying agencies are finally starting to get social! I'll point you to many of these in upcoming posts. Blogs, videos, and online communities are outstanding marketing opportunities for you; don't discount them!