I really dont like posting about another post.. but its too cool not to in this case :)

There are some really awesome new features for Cert Services in 2k8 R2.. check it out in the Certificate Enrollment Web Services Whitepaper

Original post:

http://blogs.technet.com/pki/archive/2009/09/15/certificate-enrollment-web-services-whitepaper.aspx

Doc download link:

http://download.microsoft.com/download/C/2/2/C229E624-36E4-4AD8-9D86-F564ED539A16/Windows%20Server%202008%20R2%20Certificate%20Enrollment%20Web%20Services.doc