I just noticed that Stephen Toub posted a great Suduko game.  The tablet\ink integration is really nice... and of course he posts all the code so you can see how it is done. 

Now what I really want is to see the .NET Framework 2.0 version.. how many lines of code do you think Stephen can save?  Even better, what about the WinFX version ;-)

 

Anyway, check it out, it is way better than the lame one I wrote on the airplane ;-)