Sudoku Gridmaster

GameSpot
News, previews, images, videos, links, and a forum.
http://www.gamespot.com/ds/puzzle/sudokugridmaster/

GameSpy
Provides information, screenshots, and a preview.
http://gba.gamespy.com/nintendo-ds/sudoku-gridmaster/

IGN
Preview, news, screenshots, and a video.
http://ds.ign.com/objects/824/824483.html

GameZone
Preview, by Michael Lafferty: "Just thinking about Sudoku Gridmaster is enough to make the brain throb just a bit. And that is what any good puzzler should do." <small>(May 10, 2006)</small>
http://nds.gamezone.com/gzreviews/p29231.htm