jill sommers will leave the agency today.sommers has been a frequent critic of the agency's handling of regulations following the financial crisis. she also just wrapped up the investigation of mf global, which ended with civil charges against ceo jon corzine for misusing $1 billion in customer funds. cftc chairman gary gensler's term is up at the end of the year, leaving two vacancies for the obama administration to fill. in today's cover story, a change to obamacare will give bigger businesses a bit of a break. penalties for firms of more than 50 who do not offer insurance plans to employees will go into effect in 2015, one year later than originally planned. but the move could cause more healthcare confusion. the change to its signature healthcare law shows the obama administration's willingness to listen to business concerns. "especially for the 50-and- above class, there is relief that it has been postponed. it gives them more time to communicate with employees and what is required of them by law." but the change can be