Don't forget newsgroups,
I receive most through mail.
at insecure.org's
http://seclists.org/ you can find a lot.
I'm receive from most of them a lot of good mail.
beautyofthebaud and pauldotcom.com are great! give a lot of tut's and info
bugtraq and full-disclosure for the most recent exploits etc.
TheHackersNews and infosecnews.org gives a lot of info about latests hacks, exploits, powned sites ect,. the usual..