Cool! Sounds like the new additions will be fun. And the 3D sounds like it would be really helpful for a racing game on a tiny screen. I remember playing a racing game on the DS (Asphalt: Urban GT I think it was) and I had a hard time making out what was it front of me, so I would sometimes just slam into a wall on turns. Sharper and more colorful graphics help, too, but I think the 3D could be beneficial to the gameplay.
I was under the impression that you could have either a glider or a propeller attached to your kart, but not both at the same time. It would give a clear advantage in one area, but not the other. Is this right? Or do all karts always have a propeller and glider hidden away?
If a few more great games come out, maybe I'll try to get a 3DS. Right now it's hard to justify the cost of new video games for me, though.