As far as TICSA numbers go, I'm not aware of any official release of information on this topic -- goes off to check private communications -- and can report only that the number of certified individuals is not public knowledge. However, such numbers do not yet qualify the program for "critical mass."
For more information on this topic, visit these other SearchSecurity resources:
News & Analysis: New certification targets non-security admins
Ask the Expert: Advice for retaking TICSA
This was first published in September 2002