Via Economix, the Congressional Research Service report on proposed causes of the "financial crisis" (pdf). They have a long list of candidate contributing factors, several of my 2/2009 items make the list.
My April 2010 list is much shorter -- in recent times I've stepped back from the intermediate causes and looked to global economic transformation (China, India) and information technology as the true root causes of current and, I expect, ongoing, instability.
The CRS list isn't terribly interesting. They've basically rounded up all the suspects.