So you've probably already heard that Mother Jones has video of Governor Romney saying, among other things, this:
There are 47 percent of the people who will vote for the president no matter what. All right, there are 47 percent who are with him, who are dependent upon government, who believe that they are victims, who believe the government has a responsibility to care for them, who believe that they are entitled to health care, to food, to housing, to you-name-it. . . . These are people who pay no income tax. Forty-seven percent of Americans pay no income tax. So our message of low taxes doesn’t connect. . . . My job is not to worry about those people. I’ll never convince them that they should take personal responsibility and care for their lives.
As is often the case, Wonkblog has heaps of great commentary.