So, what is a Su Doku?
This is. The rules are simple: Enter numbers between 1 and 9 into each of the blank spaces in the grid, in such a way that each small grid *AND* each row and column also contain the numbers 1 through 9. The rows, columns, and small grids don't need to be in any particular order... they just need to have all nine numerals in them.
For those who want a challenge, try printing off this post and giving the Su Doku above a try. It should keep you busy for a while. Here's a tutorial that will help you figure out some strategies to solve them.
If you want more free Su Doku crack, I would recommend the free puzzle archive at http://www.sudoku.org.uk , downloading this free Su Doku software, or getting the more expensive fix over at sudoku.com. It looks like a fledgling community called sudoku has already popped up, too.
C'mon, give it a try. It's only *one* little puzzle... (snicker, snicker!)