It appears to be official, the Legend of Zelda Spirit Tracks is scheduled to release on December 7th, 2009, in North America.
In addition to the announcement of the release date, the official box art for the title has been released and a thumbnail can be seen just to your right. There was also a brand new logo released. Both can be seen at the Spirit Tracks Gallery.
Remember, once the game hits stores, Zelda Dungeon will be providing a complete and in-depth Spirit Tracks Walkthrough.