Maple story is a great mmorpg or whatever thats called, its really nice and "cute" with its little chibi animation guys. Its also very unique, as its one of the only online rpg's were you actually move your charecter with your keyboard, and you dont click stuff to attack. Unlike most games its completly free to play, there are things you can buy, but they are of no use, such as haircuts or pets. The whole game is only about 300 mb, and its very social and fun, the only reason I play it is because someone on a forum told me about itso im doing the same thing her cuz its fun and deserves a try.
Heres a cool video of the chinese version
Some screen shots
The actual site