Steve Ballmer
CEO, Microsoft
Let's face it: The head of the world's biggest software company is a lame duck. Sure, Microsoft's board still backs Ballmer as CEO, and he still has a core of loyal executives within the company. But with longtime partner Bill Gates stepping away from his day-to-day role to focus on saving the world, and Ray Ozzie playing the role of resident visionary, the CEO job just won't be as much fun. And with employees and investors still in a froth over the company's low share price, it will be increasingly tempting for Ballmer to follow Bill's lead, and make boosting the shares someone else's problem.