It’s been a few months since Dick Costolo stepped down as CEO of Twitter. Molly Wood says that since then, Twitter board members have been having a tough time picking a replacement. Sure, Jack Dorsey, a co-founder of Twitter and interim CEO, would be a natural fit, so why are board members hesitating? They’ve got a few issues on their plate. First, they don’t think Dorsey can split his attention effectively between Twitter and his other company, Square. Second, no one really know how to define what kind of company Twitter is. If board members aren’t even sure how to define their own company, how can they appoint a CEO to run the company? There’s a lot of uncertainty, but what is certain is that Twitter needs to act soon.