There they were last night, perched at the counter at Steelhead Diner, enjoying a glass of bubbly and gossiping with the chef: Jon Rowley and his wife, Kate McDermott, quietly celebrating their appearance in the new issue of Saveur. The least ostentatious of Seattle's food stars, Rowley is probably the most influential. He's the oyster guru, the peach guru, and above all the salmon guru. No one in town has done more to change the......