Anyone who wants a thorough explanation of how the Credit of Crisis actually came about should watch this awesome video:
The Crisis of Credit Visualized from Jonathan Jarvis on Vimeo. I was sad to reach the end of the video. Maybe they can eventually do a follow up that explains the government interference in the markets (bail outs etc.) and the politics and corruption that are fueling part of this crisis. The video was extremely non-partisan or judgmental. Everyone seemed to just do there job and wanted to make money. That this also led to outright greed and morally questionable behavior cannot be gotten from this video.