Investigate THIS (With accompanying rude gesture to my Nether-regions to illustrate the point)...
There's going to be a "Task Force" to investigate the financial crisis, it's causes, it's mechanisms and the people who made it happen? You don't say! Well, might I make a suggestion?

I'll bet you the answers you get to any investigation will involve all of the following:

1. Greed
2. Stupidity
3. Ethical lapses
4. At least one Act of Congress

Because you see, all four elements are usually at the bottom of every catastrophe in American life. The unfortunate part is that you can't do anything about 1 through 3 because human nature being what it is, those issues don't lend themselves to easy solutions. However, the biggest, the real problem, is 4 and it already has a built-in solution -- it's called an election. We have one coming up (not soon enough), so let's make certain it does what it's intended to do and brings a (major) part of the solution to our current problems with it-- by getting rid of the politicians who set this in motion with their Greed, Stupidity, Ethical lapses, and the laws they've passed!

So, let's save a bundle of taxpayer money and focus the investigation on the mechanisms of the financial problems, and not look for scapegoats to absolve Congress of it's complicity in this disaster (that's why Congresscritters hold investigations, btw). We already know what is wrong, the only thing we need to know now is the how. If in the course of finding a how, we get to a who, then by all means, stand the (most-likely a Congresscritter) bastard before a firing squad.

Start the disinfecting process in the 2010 mid-term elections with Barney Frank, Chris Dodd, Chuckie Schumer, Nancy Pelosi and Charles Rangel, and then let's work our way up the food chain from there. Their absence from government would simply be addition by subtraction. I'm certain that with the removal of these weak links, we can forge a stronger chain.