Atheism, feminism, and Obama - briefly

Actual exchange, while Victoria and I were making lunch during Obama's inaugural address:

Obama: "We are a nation of Christians and Muslims, Jews and Hindus — and non-believers."
Me: "So 'atheist' is a dirty word?"
Victoria: "It would be like saying 'feminist.'"

I get the sense, actually, that all the debate over Obama being a feminist has actually lent feminism a mainstream legitimacy that it hasn't enjoyed in decades - for better or worse. But atheism? Not so much.