Nintendo's equivalent to Microsoft's xbox live points. These points can be purchased either by a credit card or through the nintendo wii's wii shop channel. There are two ways to buy the points- the first way is to buy a wii points card (or nintendo points card, same thing.) you then take the card and scratch out the gray area to reveal your wii points code that you then enter in the wii shop channel to recieve your points. The second way to buy wii points is to go to the wii shop channel, click the credit card option and enter your credit card information. Then, you can choose the number of points you want. With wii points, you can download games from past systems, such as NES, SNES, N64, turbografix, etc... also, you can download games from the Wiiware category, which are a variety of games created by various developers. There are also some different channels for your wii you can download there too, which are in a different category. Most of these channels that are available, though, are free.
I just bought 2000 Wii Points from BestBuy.