I think I found the polar opposite of Quake Wars: it’s the trailer for Nexon’s Mariokart-inspired PC racer, KartRider.
Game Trailers, we salute you.
This game has been rather popular in South Korea over the last couple of years, where Nexon have it installed on pretty much every gaming Cafe PC. Nexon makes its money from micropayments for kart upgrades, so you can log in and play for free whenever you want. The same model is being distributed over the net here, and, like Maple Story, will have US and European releases.
You can get the 232mb client for the American version here, although you seem to be able to play it anywhere. Quite why you have to enter your date of birth twice as well as your ‘ethnicity’ is beyond me, however…