New Zealand's only gold medal in the 2000 Olympics was won by Rob Waddell in men's single sculls rowing.
Jack Beatson
Rugby is not an Olympic sport. The last Olympics where rugby was a medal sport was the 1924 Games in Paris.
Softball was introduced as an Olympic medal sport for women in 1996. The United States won the gold medal at those Olympic Games held in Atlanta. As of now, softball is scheduled to be discontinued as an Olympic sport after the 2008 Games in Beijing.
Bowling
Trampolining.
It started in 1904 and 1908, they made it a medal sport. It was also in the 1928, 1932, and 1948 Olympic games but has not been competed in the Games since.
Tennis. The 1988 Games were the first Games that tennis was a medal sport since the 1924 Games in Paris.
Athletics at the 1896 Games in Athens.
That was tennis at the 1920 Games in Antwerp. Ichiya Kumagai won the silver medal.
Silver for Team eventing in the Equestrian Sport
Hamish Carter won the gold medal in Athens, 2004; he finished 26th in Sydney, in 2000. The triathlon was introduced as an Olympic sport, in 2000, in Athens.
Badminton is the official sport of Indonesia. Indonesia has won a Gold medal since the sport was first introduced in the Olympic Games.