I still can't figure out how to embed youtube video's so do bear with me.
http://www.youtube.com/watch?v=77TcnLOaRr0&feature=plcp

The guy behind this has a great sense of humor and is extremely informative. He also describes things in a rather funny way like how he explained why jails are used with untrusted users. That was pretty funny, this has to be the first *nix rapist I've seen that has a legitimate and non geeky sense of humor.