PARK CITY, Utah (AP) - Al Gore is not all that comfortable being a star of the Sundance Film Festival. He's far more concerned that the celebrity watchers hear what he has to say. The former U.S. vice-president came to town for the premiere of An Inconvenient Truth, a documentary chronicling what has become his crusade since losing the 2000 presidential election: educating the masses that global warming is about to toast our ecology and our way of life. Gore has been saying it for decades, since a college class in the 1960s convinced him that greenhouse gases from oil,...