The main web site for SELinux is provided by the NSA:
The web site includes a FAQ, available at http://www.nsa.gov/selinux/info/faq.cfm.
In addition, various Linux distributors and interested parties provide SELinux-related web pages and FTP sites. Among the most popular and useful are:
Several mailing lists address issues related to SELinux. Among these are:
You can use these lists to learn more about SELinux, get help in installing and using SELinux, and participate in the development of SELinux and related products.