I discovered this little puzzle game in a word/number puzzle book a few years ago, but it wasn't called sudoku. I saw this word, sudoku, on a bus stop bench, and was immediately intrigued. What is this? I put it all together this past week when the OC Register ran a story about this puzzle that started in the US, became popular in Japan (hence the japanese name) and is now all the rage in England. Try some yourself at sukodu.org - I recommend starting the "gentle" versions as they are definitely easier. Another good site is BrainBashers- they even have versions for the kids.
Never played? Here's the rules: each row, column, and 3x3 box must contain the numbers 1 to 9. Sounds easy, huh? Good luck.