The guys that make up YouTuber group WorldGoodSquad built a Mario Kart-style map in Minecraft, as you can see in the video above. They're even planning a small tournament that could very well be a hilarious event, considering the ridiculous mods at work.
The only thing missing now is an array of power-ups, just like in the real Mario Kart games.
Minekart 64 - Trailer [YouTube]
MarioKart in Minecraft [Imgur]