Pinterest, the company behind the popular pinboard-style social photo sharing site, has raised $200 million in a new round of funding that values the three-year-old company at $2.5 billion. New investor Valiant Capital Management led the round, which also included previous backers Andreessen Horowitz, Bessemer Venture Partners and FirstMark Capital. The news was first reported Wednesday by All Things Digital and later confirmed by the company. “Our focus is on helping millions of people discover things they love and get inspiration to go do those things in their life,” said CEO Ben Silbermann. “This investment gives us more resources to help realize that vision.” Pinterest said it plans to use the proceeds to expand its staff, further develop its technology, grow internationally and make future acquisitions. Read more.