A trip through this summer’s Venice Biennale makes you dispair of the whole idea, writes Jerry Saltz. “After a show like this it’s tempting to say that biennial culture is over, that these fetes are too big, baggy, and bureaucratic to reflect the state of art. By now it’s unclear who they’re for: The several hundred thousand who come to see them or the several thousand from the art world. Yet, just when they seem dead, a new age of biennials looms. In roughly 700 days, starting early June 2007, a kind of Harmonic Convergence of super exhibitions is slated to take place when the Venice Biennale, Documenta XII, and the Munster Sculpture Project will open one after the other.”