http://videogames.yahoo.com/events/plugged-in/caveat-emptor-wii-purchases-aren-t-forever/1399494A little snippet from the Article:
By now, consumers are accustomed to buying digital, downloadable content once, and only once. Replace your iPhone, for example, and you'll find your app purchases are waiting for installation -- and the same is true for dedicated games machines like the Xbox 360, the PlayStation 3, and the PSP.
But it's not the case for Nintendo's DSi and Wii consoles, where downloaded games are registered to a specific piece of hardware, not an individual consumer. And as those consumers are finding, when they replace their consoles with new or upgraded models, the only way for them to retrieve the games they've paid for is to plead their case to a Nintendo customer service rep, and -- if they're lucky -- go through a time-consuming and tedious recovery process.