Art activity in Seattle is necessarily dominated by thought of the Seattle World’s Fair, but writing about the Fair two weeks before it opens is rather like writing about a wedding while the caterers and florists are unpacking their trucks. We know what is expected to happen, and what the visual ingredients will be, but the culminating flavor of all this emotion and planning is still to be determined The Fine Arts Pavilion of the Fair is a large, handsome building, designed by Paul Hayden Kirk. Its 40,000 square feet of air-conditioned, fire-proofed exhibition space soar without interruption to