What Wii Games Can Be Played Against Others over the Internet?

in the uk i'm sure we've all seen the adverts for nintendo wii, and playing against others over the web (such as mario kart), but does anyone konw if there is a list of these games available to purchase, or if there is a symbol on the back of the games boxes to let purchasers know if these games are compatible to play against others online.
thanks for all the help offered

Answer:

heres a link from the official website so far only 73 games are wifi enabled
http://www.nintendo.com/games/guide#qhardware=Wii&qplay=wifi&panel=qplay