Digg Dugg: $28.7 Million

Digg, the social news site that’s long been rumored to be up for sale, has raised $28.7 million in a Series C venture round led by Highland Capital Partners. Existing backers Silicon Valley Bank, Greylock Partners and the Omidyar Network also participated.

“Today is a big day for Digg,” CEO Jay Adelson wrote on the company blog. “We’re announcing a major expansion effort–the largest we’ve undergone in our history. With a new round of funding, we’re accelerating many of the programs that we’ve been working on over the past several months, including investments in infrastructure, new feature development, international expansion and hiring all the people we need to get there.”

As noted by Adelson, Digg will put some of the funds toward the rollout of an international growth strategy in early 2009.

Not exactly the sort of announcement you’d expect from a company rumored to be the prize in a bidding war between Microsoft (MSFT) and Google (GOOG). But then maybe it’s trying to drive its asking price back up to $300 million from the more realistic $200-$225 million figure recently batted around.

Question is: is Digg worth that much?