http://www.us-cert.gov/cas/techalerts/ – This is the US Department of Homeland Security’s cyber defense site. Good to see the latest cyber tech alerts.
http://sunbeltblog.blogspot.com/ – Another good site that posts the latest computer vulnerabilities and exploits.
http://explabs.blogspot.com/ – Exploit Prevention Labs has some good information on the latest exploits and how they are being used.