Marissa Mayer Yahoo.jpgThe short list of Silicon Valley female CEOs at well-known tech companies just got a little longer.  Andrew Ross Sorkin and Evelyn M. Rusli of The New York Times Dealbook broke the story today that Yahoo has named Marissa Mayer as CEO (its fifth CEO in five years).  Mayer comes to Yahoo from a prominent executive role at Google, having been hired originally as employee number 20 and the first female engineer at Google.  Yahoo’s press release announcing Ms. Mayer’s appointment as President, CEO and a member of the board of directors, states that the “appointment of Ms. Mayer, a leading consumer internet executive, signals a renewed focus on product innovation to drive user experience and advertising revenue”.  For today at least, all eyes are on Yahoo.