Twenty-one years ago, the term "mommy track" was born in a Harvard Business Review article by Felice N. Schwartz, who warned that inflexible working conditions at companies were causing them to lose many talented women. She suggested companies divide employees into two groups -- one which is focused on career advancement and another that wants to balance career and family. Angie Kim thinks the mommy track "needn't be the dull fate feminists predicted -- and, increasingly, it's not."