It’s been over a decade since Time Warner and America Online merged in a $180-billion deal, marking the peak of the Internet bubble and the beginning of a long drought for technology stocks—a drought that has arguably been broken only by Apple and Google. Now Facebook seems to be taking the lead in the next wave of tech-stock enthusiasm, with Goldman Sachs reportedly investing $450 million in the social network, giving the company a theoretical market valuation of $50 billion and positioning it for what seems like an inevitable IPO. That may be good for Facebook and Goldman, but will it be good for investors?