I would also suggest all Windows, Linux, and Mac users subscribe to an email vulnerability service like Secunia Security Advisories. I don't know about other companies, but Secunia delivers email advisories on both Os and software related vulnerabilities. It can be a pain, because often there are a lot of advisories filling your mail box, but it does help keep you up to date on current potential problems.

To subscribe, click the link listed below.
http://secunia.com/community/profile/

JBlatz