Meteos is looking good. After actually playing this and Lumines, I was quite surprised how overrated the latter was. No offense, it was good, quite good, but I just didn't feel the magic, I didn't get 'in the zone' like you do when you play that special puzzle game.
When you play a puzzle game you play it for an hour, and after that hour, even if the design is great or poor, you either keep playing or you put it down and let it retain a (lets face it: permanant) place in the back of your gaming collection.
That's how you know whether you like a puzzle game or not. I find it difficult to put Meteos down. I found it hard to sustain enough to play Lumines in more than short bursts.
Yoshi and Another Code, both of which I never suspected I would want to get last year, are now looking to be killer DS titles as well.
Hopefully this good run of late will turn into momentum for Nintendo.