Mybudget 360 has compiled some remarkable data:
"In 2009, the number of billionaires increased from 793 to 1,011, and their aggregate wealth increased by a stunning 50% - their aggregate wealth increased by 50% during the most devastating economic crisis since the Great Depression. Their aggregate wealth increased from $2.4 trillion, to $3.6 trillion, during the most devastating economic crisis since the Great Depression. The economic top 1% of the population now controls an all time record 70% of all financial assets..."
David DeGraw summarizes the effect of these trends in wealth distribution: "The inequality of wealth in the United States between the economic top half of one percent and the remaining 99.5% of the US population is now at an all-time high"