With a six-month agreement in place to thaw some of the restrictions on doing business in Iran, international firms are now making calculations about whether to get involved in that marketplace, or wait and see what comes next. Also, Yahoo! is hiring Katie Couric. It’s the latest in a number of high-priced recruitments by the internet company, but Couric is unusual. She’s older, she’s a TV icon, and she’s a host, not a reporter. Finally, the Affordable Care Act has turned insurance brokers into a legion of private navigators for individuals and families faced with insurance decisions. The brokers are frustrated by the law’s complications and the failures of healthcare.gov, but also have a wave of new business.