(This will remove the awesome number.) I have the opposite situation with my Wi-Fi, my Wii's Wifi works, but my DS' doesn't. Stupid, really.
Motionplus is meant to make using the Wiimote a better experience, and another set of those theories Nintendo releases. Apparently, Motionplus is something worthwhile, or so several people who got Wii Sports Resort say. Speaking of which, a lot of "hard-core" gamers have been buying that, and enjoying it. Weird, but perhaps that means it's worth a buy. We'll see.
Phantom Hourglass was boring for me, but Spirit Tracks is meant to be better, so I will give that a try.