Meet the new legion of Silicon Valley's billionaire spouses who are over-achievers in their own right

Facebook Chief Executive Officer (CEO) Mark Zuckerberg has recently tied the knot with his longtime girlfriend Priscilla Chan, shortly after Facebook's anticipated IPO last weekend. Untrue to what many assume, newly wed Priscilla Chan isn't simply another stereotypical gold-digging billionaire's arm candy, nor has she any reason to change her Facebook status to 'Jackpot'. In fact, Chan joins the new legion of Silicon Valley billionaire spouses who are achievers in their own right.