Found some interesting links while I was checking out the skills being measured for 70-229 (wanted to make sure nothing has been added that I didn't know about).
Newsgroups - Microsoft Learning Community Newsgroups
Number of MCPs Worldwide broken down into categories.
- 14,495 MCAD
- 7,674 MCSD for .net
- 1,904 MCSA: Security Specialization - least amount of certs