When was New Super Mario Bros. released? It literally is one of a handful of DS games that were released years ago and is still priced at (or above) it's original MSRP. I've seen it in Best Buy, GameStop, and other stores for as much as $35 in the past few days.
$35 is and has always been the MSRP. I'm not exactly sure what factors go into deciding the price of Nintendo's own DS games, but some are $35 and some are $30.
Thanks, Mop_it_up. Rather than MSRP I should have said it's original prices, since some retailers undercut Nintendo's $35 MSRP, and sell them for $35. It's still amazing to see a 2005 game priced that high and still sell! Remarkable! Not to mention, GameStop is even offering a chunk of change for it, compared to normal: $20. I was shocked when I saw that the other day, really.
Captain N, Nintendo could have, but not just as easily. They didn't make the DS title with co-op, at all! I think they wanted to gear the stages specifically for someone playing with several players on a screen with enough real-estate for both good players and bad to play at the same time. So hold off before you say four-player co-op could have been done just as easily, and wait to play the game. From the previews, a lot more is going into the title than you give it credit, and that's obvious in the few stages of which there are videos, too.
Also, you'd be surprised at the amount of people who don't like online gaming in general. I have much, much more fun playing StarCraft via lan with my roommate, and all other online gaming I've done, via PC, DS, or Wii, hasn't been so good when it comes to actual gameplay. To me, when I'm not in the same room with someone, it's not the same, even if I know the person I'm playing online with. I very much enjoy games with local multiplayer to a more vast extent than something similar with online-exclusive multiplayer.