You may want to try asking this question on the Ning developer network at build.ning.com.
I believe that we do not expose the email address of users through the OpenSocial API because of privacy concerns. The reason we…"
"Thanks for reporting this Kyle! I am working on fixing this right now. It appears that if an admin previews their blog post change before making it that they no longer have the option to feature or un-feature the blog post.
With any luck, we…"