Great piece in the NYT/IHT on the company behind Sudoku and similar games. Their approach — no trademarking, harnessing users to help develop and perfect games — all sounds very Open Source:
Nikoli’s secret, Kaji said, lay in a kind of democratization of puzzle invention. The company itself does not actually create many new puzzles — an American invented an earlier version of Sudoku, for example. Instead, Nikoli provides a forum for testing and perfecting them. About 50,000 readers of its main magazine submit ideas; the most promising are then printed by Nikoli to seek approval and feedback from other readers.