FAA Human factors site is
http://www.hf.faa.gov/hfmaint/Default.aspx?tabid=275
Its is a huge data base, training coarse etc so ensure lots of paper in the printer available
Also a source of good articles relating to maintenance incidents monthly (including thise caused by human factors) reports is the Aviation Maintenance magazine
as available also online at
www.aviationmx.com
Just completed putting together our Human factors coarse for our engineers (awaiting it approval)