“When the Vennice Biennale opens to the public in two weeks, Fred Wilson will be America’s artist. His $650,000 show, titled ‘Speak of Me As I Am’ and organized by the curator Kathleen Goncharov of the List Visual Arts Center at M.I.T., will scrutinize some longstanding American themes — immigration and integration — but will view them through Venetian history.” So how was it decided that Mr. Wilson would represent us? A panel of course…