In the past few years, stay-at-home moms have come under fire from some of feminism's most hard-line mouthpieces. These mothers have been told that they're letting down the sisterhood, endangering the economy and -- most important -- undermining their own position. By failing to bring in at least half the family income, it is claimed, they have rendered themselves powerless in their own homes.

"Incomes give women power in their marriages," says Leslie Bennetts, a Vanity Fair writer and frequent "Today Show" guest. She has...