http://seclists.org/
http://www.darknet.org.uk/
http://www.f-secure.com/weblog/
http://technet.microsoft.com/en-us/security/bulletin
http://packetstormsecurity.org/
http://isc.sans.edu/
http://www.schneier.com/
http://krebsonsecurity.com/
http://nakedsecurity.sophos.com/
http://taosecurity.blogspot.com/