Check the Future Products Asia section of Automotive News:
http://www.autonews.com/article.cms?articleId=40492
Excerpt:
GT-R: While Nissan has said that it wants to turn the GT-R concept, a four-passenger coupe, into a production vehicle and market it in the United States, designers here dislike the styling direction the automaker is taking. Also, Nissan still has to make a business case for selling the vehicle outside Japan.
If it is given the green light for the U.S. market, it will come with a price that could top $60,000. The earliest would be the 2006 model year.