Just as Reggie Fils-Aime predicted at Nintendo’s E3 Keynote, the Wii has become the best selling home console in the U.S. after 20 months.  Nintendo already found worldwide dominance, but the U.S. as a region was the sole, key holdout.  Here’s the press release that details the NPD Group’s data findings:

Equaling its status on a worldwide basis, Wii has become the best-selling video game console in the United States. According to independent sales tracking information from the NPD Group, more than 666,000 Wii consoles sold for the month of June, and nearly 10.9 million Wii consoles have been sold in the United States in the 20 months following its November 2006 launch. The system is credited with breaking down the psychological barriers between gamers and non-gamers.

"Wii was created with the goal of expanding the gaming universe through its intuitive motion-sensing controller," said Cammie Dunaway, Nintendo of America’s executive vice president of Sales & Marketing. "As we have demonstrated this week during the E3 Media & Business Summit, Wii continues to pioneer new ways for people to interact with their video games and with one another."

The portable Nintendo DS finished as the top-selling U.S. video game system in June, with more than 783,000 units sold. To date, more than 20.8 million Nintendo DS has been sold in the United States.

The report also shows that six out of the top 10 best-selling games for June are made for Nintendo systems, including Guitar Hero® On Tour (No. 2), Wii Fit? (No. 4), Wii Play? (No. 5), Mario Kart® Wii (No. 6), LEGO® Indiana Jones?: The Original Adventures for Wii (No. 7) and LEGO® Indiana Jones?: The Original Adventures for Nintendo DS (No. 9)