News Flash: all that twitters is not marketing gold. In fact, a new study by the Harvard Business School shows that 10 percent of Twitter users generate over 90 percent of Twitter content. What about the other 90 percent of Twitter accounts? The Harvard study indicates that most folks who sign up with Twitter only “tweet” once and then fly away, never to be heard from again. To survive, Twitter needs to find a way to turn this “loved by few, abandoned by many” business model upside down. The good news for Twitter: their brand name keeps growing. Celebrities and the news media just love saying their name out loud. Now they just need to add something substantive and sustainable to their service. And they’d better be quick about it. After all, Harvard has already called them out. They better hurry up before Clara Peller rises from her grave and shouts “Where’s the beef?” When that happens, Twitter’s done.