What, no mention of IronGeek's videos?
http://www.irongeek.com/i.php?page=security/hackingillustrated
Free Metasploit course from Offensive Security:
http://www.offensive-security.com/metasploit-unleashed/
Great exploit writing tutorials:
http://www.corelan.be:8800/index.php/category/security/exploit-writing-tutorials/
Security cheat sheets:
http://blog.securitymonks.com/2009/08/15/whats-in-your-folder-security-cheat-sheets/
There's also tons of talks available online from most of the InfoSec &
hacking cons....