Winklevoss Twins of Facebook Fame Return to Invest in SumZero (John Jannarone/Wall Street Journal)
 John Jannarone / Wall Street Journal:
Winklevoss Twins of Facebook Fame Return to Invest in SumZero  —  The Winklevoss twins lost the biggest social-network showdown ever when their rival, Mark Zuckerberg, walked away with Facebook.  Now they are trying again—with a social network for professional investors.
Winklevoss Twins of Facebook Fame Return to Invest in SumZero (John Jannarone/Wall Street Journal)
 John Jannarone / Wall Street Journal:
Winklevoss Twins of Facebook Fame Return to Invest in SumZero  —  The Winklevoss twins lost the biggest social-network showdown ever when their rival, Mark Zuckerberg, walked away with Facebook.  Now they are trying again—with a social network for professional investors.