The DS demo section of the Nintendo Channel is usually swamped with bland Touch! Generations fare, but it now looks like Nintendo has abandoned that policy to bring us some potentially interesting games to try out. What a novel concept! Top of your "to download" list (if you haven't already bought it) should be Lock's Quest, 5th Cell's ace tower defense/real-time strategy, which reviewers have been throwing superlatives at from every direction (stay tuned for our review later this week).
Spore Creatures is there also, and while it may not have attracted the same loving critical response as Lock's Quest, it still piques our curiosity, simply because it's not the Spore everybody else has been banging the drum for. There's a demo of MySims Kingdom as well, which looks adorable, and an anagrams demo for sdrsorsCwo SD. These all expire October 5th, so don't delay!