Here are websites I frequent alot:
http://www.securityfocus.com
http://www.packetstormsecurity.nl
http://www.sans.org
http://www.cert.org
http://www.securiteam.com
http://www.linuxsecurity.com
http://www.phrack.org
http://www.neworder.box.sk
http://www.slashdot.org
http://www.google.com
http://www.securitynewsportal.com
http://www.infosyssec.com
http://www.snort.org
http://www.honeynet.org
http://www.dshield.org
http://www.astalavista.com
http://www.whitehats.com
http://www.incidents.org
http://www.microsoft.com
http://www.iss.net
http://www.cisecurity.org
http://www.networkintrusion.co.uk
http://www.isc.incidents.org
http://www.grc.com
http://www.foundstone.com