Last month we brought you thrilling news of casual gaming, including our very own Hexic game for the Zune's 3.0 release. "Rounding out this embarrassment of riches" (Engadget, Zune 3.1 update out today - now featuring Sudoku!), update 3.1 has been released and with it comes the addition of Checkers, Space Battle, and our very own Sudoku.

Sudoku!