Robert Blair has released (12/11/2007) version 1.02 of his Sodoku game for OS/2. The game acts as a "whiteboard" for Sodoku puzzles, and is considerably easier (and a lot more fun) to use than paper and pencil. A sample puzzle is included to help you get acquainted with the program, along with a REXX script to download the daily Sudoku puzzles from the "Sudoku Online" web site.
Source: OS/2 Warp News and Rumors.