by Mike Krumboltz Ever said something you didn't mean to say? Ever hit "reply-all" on an email by accident? Ever do anything really, really dumb? Well, you're in good company, especially this week. Several high-profile gaffes led to embarrassing moments for celebrities, who, frankly, should have known better. Ann Curry mix-up On "The Today Show," Ann Curry is a much respected interviewer and host. But during her commencement speech at Wheaton College in Massachusetts,