The best thing you can say about it is that it is arguably the greatest kart racer in gaming history; the worst thing you can say about it is that it single-handedly spawned literally dozens of inferior imitators.
Still, the all-time amazing brilliance that is Mario Kart is heading onto the Nintendo DS in a revamped version, entitled (very unimaginatively) Mario Kart DS, and is looking tastier than Britney Spears' naughty bits.
So, without further ado, here is an E3 trailer for you to view. It's not particularly long, but still well worth the effort.
Mario Kart DS trailer