Like everyone else, I am worried about my investments and retirement savings. The Mint blog has one of the best visual aids I've seen which explains the financial, banking, and housing mess in the USA (and worldwide).
Some pundits blame consumers who bought more house than they could afford. Some pundits blame predatory lenders. Some pundits blame the banks for repackaging mortgage-backed securities without accurately indicating the risk (and while relying on CDOs as "insurance"). Some pundits blame government and the financial ratings companies for the lack of oversight. Some pundits blame politicians for changing Federal laws that contributed to this mess.
Seems to me, this mess is big enough, far-reaching enough, and damaging enough to consumers that there's plenty of blame to go around for all of the above.