<strong>President and CEO, Yahoo</strong>
The Google veteran (she was its 20th employee and first female engineer) received a call from Spencer Stuart über-recruiter Jim Citrin in June, dangling the top job at Yahoo. The move was risky; Yahoo's notoriously fickle board has named four CEOs in five years. But after 13 years at Google, most recently steering its local and map business, Mayer jumped at the promotion, ) notwithstanding the expected October arrival of her first baby (a son, born Sept. 30). Mayer's product development chops -- Google's iconic search page design is said to be her brainchild -- provide hope for the struggling Yahoo, which needs serious help growing revenue -- and its stock price.
<strong>First move: </strong>Free lunch for everyone at Yahoo's Silicon Valley office.
<em>--Colleen Leahey</em>, Photo: Martin Klimek/Corbis