Word-of-mouth research firm BuzzMetrics has appointed former senior analyst at Jupiter Research Gary Stein to lead its new San Francisco office as Director of Client Services, reports market research-related portal site MrWeb (via Rick Bruner). Stein has appeared on CNN and has been widely quoted in The Wall Street Journal and other newspapers and trade journals. Stein will continue to write an interactive marketing blog at www.steinblog.com. Jonathan Carson, President and CEO of BuzzMetrics, describes Stein as "one of the most respected research authorities in interactive marketing."