Jonathan Meiburg of Shearwater (05/05/08) Jonathan Meiburg, frontman for Shearwater, has announced that he is leaving Okkervil River to focus exclusively on Shearwater. Meiburg says the split is “completely amicable”, and that Shearwater has grown to the point that it excludes his further participation in Okkervil. “This is just a logical extension of the way…