The NY Times has additional details on Hsu's disappearance–his lawyer said Hsu's whereabouts are unknown, and the judge revoked his $2 million bail and issued a warrant for his arrest. But Hsu was supposed to turn over his passport at today's hearing, which means he could already be out of the country.
Clinton campaign spokesman, Howard Wolfson, said in an email: "Norman Hsu is a longtime and generous supporter of the Democratic party and its candidates, including Senator Clinton. During Mr. Hsu's many years of active participation in the political process, there has been no question about his integrity or his commitment to playing by the rules, and we have absolutely no reason to call his contributions into question."
As quoted in the Wall Street Journal, last Tuesday, August 28, 2007.