Play Sudoku Online

Sudoku fans around the globe is a crowd continuously growing since the game became popular worldwide 2 years ago. The concept is very simple: fill the boxes on the 9x9 grid with numbers from 1 to 9, with no row or 3x3 box containing same numbers. You begin with some clue-numbers and have to fill the others.
Enough with the explanations, probably you already know how the game goes and my aim here is to provide you some cool game links.
So I found Sudoku Craving, a site where a new sudoku puzzle is available every day. And if you create an account you can track your progress and get more statistics.
I also found this article about the history of Sudoku witch includes plenty of knowledge about the roots of this popular mind-breaking game..