No matter what they're selling, all companies are in the business of connecting people, says Mzinga CEO Barry Libert, whose company creates social networks for businesses. The trouble is, he says, they often fear such interaction. No CEO wants to appear vulnerable, especially not men, he told a group of executives at the Milken Institute Global Conference. "As long as guys run businesses, sharing and collaboration and social interactions is going to be tough for most businesses, so we'll see." Read the full post on our SmartBlog on Social Media.