While there are lots of DS games that support online multiplayer over the Nintendo Wi-Fi connection, there are also many titles that use the service for some other online content. Level sharing is becoming a more common feature, and even downloadable content is available in a few games (though sometimes, it seems to really just be unlockable content). While we know many gamers crave online mutliplayer to extend the fun and replay values of their games, we're finding that these other uses for Nintendo's Wi-Fi can be just as interesting. Sometimes, of course, they're mediocre, but that's par for the proverbial course with any feature. The question is -- do you enjoy these options? Do you remember to use them? Have you unlocked puzzles in Professor Layton and the Curious Village or check out Civilization Revolution's games of the week?