Ads! Three years after their first round of funding, Twitter has finally determined a way to make money from their business. The company intends to roll out its Promoted Tweets program, which allows marketers to insert their own messages into users’ message streams. Although Twitter draws revenue from licensing partnerships with companies like Google, Yahoo, and Microsoft, this move is the first to create serious financial growth for the company—and another advertising nuisance (or opportunity) for the rest of us!