The list of the world’s CEOs regularly includes celebrities, billionaires, big egos, risk takers, and failures. What it does not include are social media experts; but that’s about to change. When IBM (NYSE: IBM) conducted its study of 1709 CEOs around the world, they found only 16% of them participating in social media. But their analysis shows that the percentage will likely grow to 57% within 5 years. Why? because CEOs are beginning to recognize that using email and the phone to get the message out isn’t sufficient anymore.