Most of the stadia see some use. Soccer games, track meets, concerts and other special events fill up the roster.
Berlin's has long been used and will be upgraded in time to host WC 2006.
London's Wembly has been demolished and is due for reconstruction.
Helsinki's has been used for track meets such as World Champs.
Melbourne's is a cricket ground.
Rome's and Munich's are used for track meets and soccer matches - World Champs in both have been held there.
Mexico's main stadium is part of the university campus.
Montreal's is the most used - for baseball, the Grey Cup, trade shows, conventions, concerts and other big shows. The tower and velodrome (now biodome) are popular tourist attractions.
Moscow's had awnings added since 1980, but is in need of repair.
LA's is used for football and such.
Not sure about Seoul?
Barcelona's is used for soccer and is a popular tourist attraction.
Atlanta's is now a baseball diamond - Turner Field.
Did Seoul's stadium play any part whatsoever in the 2002 World Cup?
The MCG (Melbourne Cricket Ground), is merely just a name though. It was orignally founded on the site that is now Olympic Park, as the Melbourne Cricket Club in 1852.
Over time different potions of it were constructed. In 1908 it was the World's largest stadium with a capacity of some 55,000.
It was vastly reconstruced to seat 105,000 (the second largest Olympic capacity ever), for the 1956 Olympic Games.
Since the Olympics it has hosted concerts, AFL football games (which if far more popular than cricket), rugby and soccer games. The largest crowd ever in the stadium was for the 1971 AFL Grand Final where seating was increased, and some removed to accomadate an estimated 141,000.
In 1989 work began on demolishing half the stadium in hope Melbourne would be successful in its bid for the 1996 Olympics, however, it seemed to be Atlanta's time. Half the stadium was finished in 1992, and the other half remained the Northern-Olympic side. Capacity was reduced to 95,000.
However Melbourne's successful bid to host the 2006 Commonwealth Games has seen the other Olympic-era half of the stadium go under the wrecking bull for reconstrucion. The new MCG will seat just over 102,000 spectators. It will host the opening ceremonies and athletics for the C'Wealth Games.