San Francisco: Social networking site Facebook may go public on the later half of 2012, paving the way for the investors who want to have a slice of one of the most highly anticipated initial public offerings of the decade, reports Alexei Oreskovic of Reuters. Facebook board member and Venture Capitalist Peter Thiel said that the offer will not be open until late 2012 and it would depend on the company's certain revenue targets and development of its business model. Facebook founder Mark Zuckerberg, whose net worth was estimated at 6.9 billion dollars by Forbes magazine last week, said in March that he was in no hurry to launch an IPO for Facebook. The California-based company is privately held and has released very less financial information till now. Facebook has almost half a billion users today, and according to sources its revenue approached $800 million in 2009, which is a good showing for a six-year-old service. The company's backers now include Digital Sky Technologies, Microsoft Corp, Hong Kong tycoon Li Ka Shing and venture capital firms Accel Partners, Greylock Partners and Meritech Capital Partners.