All of Polarbit's (the developer, being published by Konami) other games (Raging Thunder, Wave Blazer, Armageddon Squadron, Iron Sight) have online multiplayer, so I assume this one will too.
Crash Nitro Kart 3D does NOT, I repeat, does NOT have ONLINE PLAY! And it is not by Polarbit, it is made by Vivendi Games, and published by none other than Activision! Link on AppStore: http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=285005463&mt=8
Vivendi was the publisher. The game was contracted to Polarbit http://www.polarbit.com/cbnk3d.html arn
Pfft. I hate Konami. They make decent games but they are only available to very few countries. They would make so much more money if they made it available internationally to every country. It's like how they only make games for the Playstation.
They make games for every next-gen game system...handheld or console. You're probably just referring to MGS4 which Konami hinted at porting to 360 but has keep quiet about for over a year.
graphics are crap, worse than DS, but hey it's MARIO kart. Everyone's going to love this INSTANT buy like Zenonia 2