Update:
Feel the Magic: It rocks!! i initially played the first couple of minigames (there's usually two or three per scene), and put it down to play Mario. After getting back into it, i couldn't put it down. i didn't realize that you don't have to comlete all of the minigames in each scene, you only have to beat enough games to get 100 total heart points, which are given to you after the completion of each game, and deducted if you lose a game. At times, it's really geeky, as wooing a digital girl would be, but it's always funny and usually fun, although some of the games do drag on a bit as you learn how to work things.
One of my favorites is the boss battle where you use a steering wheel on the touch screen to drive a truck, hit pedestrians to add them to your truck, then slingshot them into the boss truck to beat it. Yeah, this game is very unapologetic in it's wackiness. i'd say i'm close to the end of the game at what i'd guess to be about 90 minutes in. Even so, i haven't completed all of the games in each scene, nor gotten any extra costumes. The funny thing is that it's really a game that could've been released on a PDA. But i haven't seen such a cohesive mix of style, humor, and simple but rewarding gameplay in any PDA games.
Mario 64: After using the touch control almost immediately after the standard control, i've hit a roadblock. The touch screen functions very well, but not perfectly. As noted in the 1up review, Mario 64 is a game that had moments that were difficult even with the N64 analog stick, and to add the artificial difficulty of a control scheme that the game wasn't originally developed for worsens things. i find myself recentering my thumb on the touchpad to regain analog control, and positioning the camera so that jumps are directly ahead. On the plus side, while the use of the second screen as a map screen is often lauded, it's very welcome for me. Call it dumbing down the game, but i don't feel like having to explore every part of a stage for stars; it's much easier to locate them on the map and just go to that location. i don't know everything that's new to the DS version, but judging the game by the main quest so far, it's excellent. i never got into the original N64 version, so it's like a new game to me. And the minigames are like crack. i won't even bother trying to pick a favorite. They're all excellent. i jokingly told a friend on AIM that Nintendo should just only release games like Warioware that were a collection of minigames.
Metroid Hunters demo: i've only loaded the game up a couple of times. i've yet to finish the regulator training mode. It looks good, sounds okay, and controls extremely well, but there's no substance. Walk, shoot a dozen enemies, repeat. It looks and feels like a fan-made Quake mod. The lack of a scanning or even different visors is understandable, especially this early, but the lack of different weapons, or even a charged shot is disappointing.
Overall, i'm satisfied with my DS. It really hasn't presented any groundbreaking gameplay concepts, but i don't expect that from launch games. These are a preview of some of the better games come. While some would see it as a gimmick, introducing things like dual screens, a touch screen, and a microphone to a portable brings a different set of tools that developers can use to innovate than just upgrading the graphic and sound capabilities. i can understand the apprehension towards the touchscreen and lack of a standard analog. While it hurt Mario 64 DS, as i said above the game wasn't originally developed for it, and the touchscreen use is actually really good despite it's flaws.
As if i haven't mentioned it enough, get a stylus pen if you really want to play games that require the stylus. Stylus pens, at the most basic have a stylus in a pen casing, so it's easier to hold solidly. They're also available with ink pens, pencils, laser pointers, etc. You can get stylus pens from any place that sells PDAs, and they start at $10. If you just want a stylus, you may be able to find one at an office supply store clearance bin for less than $10. i'd also recommend picking up a screen protector for the touchscreen. i'll see if Walmart has the Intec protectors in as today as they said they would.