Sudoku Craving is a place where you can play Sudoku against other online players. Like most online sudoku sites, it features easy, medium, and hard levels. The site's design looks great when viewed in Firefox and Opera, but there seems to be some styling problems in other browsers. Anyway, the only other downside I'm seeing is that the puzzles don't have symmetrical patterns (which is considered a must by some), but then that's just my weird obsession with aesthetics. For those who think standard symmetrical sudoku puzzles are boring, you might also like to try out Nonomino Sudoku (also called Jigsaw Sudoku).