"There's no letup in sight," says George Harrison, Nintendo of America's senior vice president of marketing and corporate communications. "Nintendo DS appeals strongly to both core and casual gamers, and its momentum is set to propel us into 2008."

Nintendo DS began 2007 strong, but its momentum only increased as the year progressed. Before 2007, Game Boy Advance held the all-time U.S. Thanksgiving week sales record, with 600,000 systems sold in 2005. But Nintendo DS beat that Thanksgiving week record with more than 650,000 sold.

The huge appeal of Nintendo DS stems from the diversity of software available for the system. Four Nintendo DS games have sold more than 2 million in the United States alone, including New Super Mario Bros., Mario Kart DS, Pokémon Diamond and Super Mario 64 DS. Another eight games have sold more than 1 million each in the United States, including Brain Age: Train Your Brain in Minutes a Day, Pokémon Pearl, Animal Crossing: Wild World, Big Brain Academy and four separate versions of Nintendogs.