The Boston Globe profiles Gather.com, the blogging and social-networking website backed by the parent company of Minnesota Public Radio. “We think of Gather as doing for user-driven content what eBay did for user-driven retail,” says Gather founder Tom Gerace. “Today, the problem in the blogosphere is finding what you want.” The startup announced last week that it received another $6 million in equity financing, some from Southern California Public Radio, a sibling to MPR.