Actually there’s been one other—a B737-300, Garuda Indonesia 421, in 2002, successfully ditched into a river after a double engine failure in a thunderstorm (shades of Southern 242). There was only one fatality, a flight attendant. It was, however, more of a crash than a ditch, because the river was only a meter deep where they hit.
http://aviation-safety.net/database/record.php?id=20020116-0
}:-)4
As I said about 100 or so posts back, this is the first water landing of a jet airliner in more than 20 years where the plane was intact. Last one was in 1985; a DC-10 that had a failed/aborted takeoff in Puerto Rico and went off the runway into a lake.