From the NYT:

The increase in incomes of the top 1 percent of Americans from 2003 to 2005 exceeded the total income of the poorest 20 percent of Americans, data in a new report by the Congressional Budget Office shows.

The poorest fifth of households had total income of $383.4 billion in 2005, while just the increase in income for the top 1 percent came to $524.8 billion, a figure 37 percent higher.

The total income of the top 1.1 million households was $1.8 trillion, or 18.1 percent of the total income of all Americans, up from 14.3 percent of all income in 2003. The total 2005 income of the three million individual Americans at the top was roughly equal to that of the bottom 166 million Americans, analysis of the report showed.

The report is the latest to document the growing concentration of income at the top, a trend that President Bush said last January had been under way for more than 25 years.

Earlier reports, based on tax returns, showed that in 2005 the top 10 percent, top 1 percent and fractions of the top 1 percent enjoyed their greatest share of income since 1928 and 1929.

Could someone remind me what happened in 1929?

It's worth reading the whole story, because there is some complexity to this issue. For example, did the rich gain because of the stock market or because of tax cuts pushed by the Bush administration and its Republican allies?

I found this snippet offered some useful insight:

Jared Bernstein, an economist at the Economic Policy Institute in Washington who characterizes the Bush administration’s policies as YOYO economics, based on You (Are) On Your Own, said the differences in income growth explained why so many Americans have told pollsters that they are feeling squeezed.

“A lot of people justifiably feel they are working harder and smarter, they are baking a bigger and better pie, and yet their slice is not growing much at all,” Mr. Bernstein said. “It is meaningless to middle- and low-income families to say we have a great economy because their economy looks so much different than folks at the top of the scale because this is an economy that is working, but not working for everyone.”

At every income level Americans had more income, after adjusting for inflation in 2005 than in 2003, but the increases ranged from almost imperceptible for the poor to modest for the middle class and largest for those at the top.