www.AVIEN.org offers the EWS (Early Warning System) service. The subscribers to the EWS act as a grassroots warning network. Together, they represent more than five million PCs worldwide.
All major AV vendors offer a free service with warnings about new viruses. In addition, there are several sites which will send you info based on the vendor alerts.
For more information on this topic, visit these other SearchSecurity resources:
Best Web Links: Advisories and Alerts
Best Web Links: Malware
News & Analysis: Beating malware: Beyond antivirus software
This was first published in April 2002