I am seeing the same numbers as you are, Brett. There seem to be some slight variation in regional locations, but not a whole lot. I think it's a supply and demand issue. Overall, there has been an historic shortage of anesthesia personell (both MD's and RN's), and the trend is reportedly going to continue.
As for certificates....there is a distinct historical parallel between CRNA programs and nursing programs
in general. There were many, hospital-based "certificate" CRNA programs, that were not degree-granting (much like diploma RN programs). Many CRNA's practicing today have such a certificate, and some CRNA programs offer a Master's Degree program for those who wish to obtain one. Now, however, just as the BSN is now considered the entry-level degree for the RN, the MS (N) is considered to be the entry-level degree for the CRNA. Folks are divided about the nature of the Masters.... some feel strongly about it being an MS in Nursing, while others feel it appropriate to be in Nursing Anesthesia, (NOT an MSN), while others grant a Master's degree in Biology or Health Sciences. I'm pretty sure there is a thread on this board about that.