Hey! I just rolled back into town from taking the two-day training on MMA refereeing and judging provided by the Association of Boxing Commissions. (It was in Austin; I'm in Houston.) While the ABC itself doesn't certify or sanction judges or refs, this course is a preamble to getting certified by the NSAC, CSAC, TDLR, etc.
Attendees numbered about 50-55, and included a large crowd of people who planned to get into officiating, plus a half-dozen of the best-known refs/judges in Texas.
If anyone's curious, I'm here to answer any questions.
EDIT: I should have mentioned this off the top, but beyond simply taking the training, there was a test at the end. While the results won't be published for another week or so, I have good reason to believe I did well on it.