I'd start worrying about some municipal bonds and short term debt. As the financial issues worsen, states and cities with high levels of financial industries (New York, New Jersey, California, amongst others) are seeing a reduction in tax revenues. New York is going to have a special legislative session to adjust to major revenue losses from the recent bankruptcies. Their bonds will be at risk in a protracted credit crunch. Politicians will be reluctant to cut spending to cover bond holders until it actually collapses and maybe not even then. Historically, municipal bond defaults get real ugly real fast. You can't count on the "insurance" that has faulty credit standing either.
Hey, aren't you one of the people that think we don't need a "bailout?" Then it will be good that market forces work their magic.