Always a subject everyone cares about...Check out http://accidents-ll.faa.gov/, a super new website from the FAA. The site is entitled "Lessons Learned from Transport Airplane Accidents" and includes such subjects as Airplane Threat Categories and Accident Common Themes.
The AOPA also has an Air Safety Foundation, http://www.aopa.org/asf/safety_topics.html. You don't have to be a member to access the site and just about any topic you'd need information for is included.
