Twitter has closed their third round of financing, says Om Malik. He pegs it at a $15 million raise at around an $80 million valuation, but doesn’t know the investor. We (and others I’m sure) have been tracking the same story, and it’s pretty clear the new investor is Spark Capital.
A source says Twitter signed a term sheet with Spark Capital a couple of weeks ago, and Spark partner Bijan Sabet was in San Francisco today visiting “a very special company.” Other hints on Twitter: cofounder Evan Williams remarked that he was walking down Newberry Street in Boston late last month - my guess is he walked right into the building at 137.

Full story: techcrunch.com