Twitter's long-speculated funding round is finally real:

Twitter's long-speculated funding round is finally real: Spark Capital and AMZN founder Jeff Bezos (via Bezos Expeditions) led the round, with existing investors Union Square Ventures and Digital Garage also participating. Spark's Bijan Sabet, an active Tweeter, joins Twitter's board. Co-founder Biz Stone didn't get into financial details on his blog post, but the numbers are probably similar to the ones floating around in May -- a $15 million round at a "bit less than" a $100 million valuation. [Silicon Alley Insider]