Michael Howard posted a blog entry My Daily list o' Links. There he lists quite a few sites he says he's scanning every morning for security-related tidbits. I quote his links here too because you just can't have too much security in the morning

• http://security-protocols.com/
• http://www.csoonline.com/
• http://www.governmentsecurity.org/
• http://johnny.ihackstuff.com/
• http://infosecuritymag.techtarget.com/
• http://monkey.org/~jose/secnews.html
• http://isc.incidents.org/
• http://www.linuxsecurity.com/
• http://searchsecurity.techtarget.com/
• http://www.securitypipeline.com/
• http://www.zone-h.org/