Deep into the Big Red - Forbes: "Ten reasons Wall Street should be (very) worried about the U.S. debt." There are two common themes in the article: one is that spending is on auto-pilot and there is virtually no political will to address an unsustainable level of debt. Otherwise, it's a fun read.
Related - Zero Hedge notes that non-revolving debt has hit an all-time record, as the federal government encourages car loans to prop up Government Motors and further inflates the student loan bubble.