Twitter has hired Adam Bain as head of all revenue for the company, we've heard from multiple sources. His title will be President, Revenue and he'll be reporting to COO Dick Costolo. Twitter has also hired Brent Hill away from Google to run sales in the midwest region. Hill, along with recent hires Amanda Levy and Dan Coughlin, will report to Bain. Until very recently, Bain reported to Jon Miller and was President of the Fox Audience Network, the monetization arm for MySpace, IGN and other News Corp.