Twitter Grows Up, Adopts Business Plan

Twitter is finally taking off the training wheels and moving into the world where real businesses tread with the launch today of its first advertising model. coming up with a business plan or even talking about one. Just last October, Twitter CEO Evan Williams told an audience at the Web 2.0 Summit in San Francisco that the company wanted to focus on developing the site, instead of on a business model. But the time has come for Twitter to figure out how to make money over the long haul