Multiplayer Sudoku

I've been trying to think of some good examples of jSeamless that wouldn't take too much time to write, but would show the power of jSeamless and some of its capabilities. To that end I've started developing a multiplayer Sudoku game. The puzzle is generated and displayed to all connected players. As each person provides a correct number they get points and that field is "solved" on all other player's board as well. If you get a number wrong you lose points. A winner is decided by how whoever had the most correct numbers in that puzzle. I'm creating a whole account management system, scoring system, database logging and statistics, and internal chat. This should be a pretty fun game when it's finished.

Here's an early screenshot: