To dig deeper into SELinux, there are a variety of technical reports , FAQs, and component documents available. Here are a few places you can try:
SELinux FAQs ( fedora.redhat.com/docs/selinux-faq ) - This site provides information specific to the SELinux implementation in Fedora Core.
SELinux Documentation ( www.nsa.gov/selinux/ info /docs.cfm ) - This site provides links to published papers, technical reports, and presentations related to SELinux.