Yesterday's news that Wii Fit continued to ride high on the U.S. video game sales chart last month told only half the story.

I just confirmed with the NPD Group that the fitness title's lifetime sales has topped Halo 3's. As of the end of February Wii Fit has sold 6 million copies in the U.S. while Xbox 360 goliath has moved 5.9 million copies in its life time.

Keep in mind that the $90 Wii Fit launched in the U.S. on May 21 of last year, while Halo 3 hit the Xbox 360 on Sept. 25 of 2007.

With 6 million balance boards out there and a legion of Wii owners, there's got to be an incoming wave of games developed for the new peripheral.

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