Kevin Werbach Wharton professor of legal studies and business ethics is a dedicated blogger especially when it comes to technology news and innovation. He sifts through 300 to 400 blogs using NetNewsWire for the Mac a blog management tool that allows him to quickly scan new posts. ”I look for blogs that tell me something I don’t already know including in areas where I am an expert ” he says. Knowledge at Wharton asked several faculty members and technology experts to comment on the appeal and usefulness -- or lack thereof -- of blogs.