AOPA's Air Safety Foudation web site is the standard for aspect of our hobby, in my opinion. It is so impressive that I'm making a link to it a 'sticky' in the Safety section here.
The topics of discussion and amount of data available is staggering. Please see for yourself: http://www.aopa.org/asf/safety_topics.html
AOPA Safety Publications/Articles: http://www.aopa.org/asf/publications/
You do not have to be an AOPA member (with username/password login creditials) to access nearly all of the safety articles.
On a side note, I'd ask that when safety event come up to please add them to the calendar.