Short answers, pulled from the story.
The main NBA Store in New York City is located at 545 Fifth Avenue, Manhattan, near 45th Street. It opened at its current address on the 21st of December 2015, after the original location at 666 Fifth Avenue closed in 2011 and the league operated a temporary store at 590 Fifth Avenue until August 2015.
The first NBA Store opened in the fall of 1998 at 666 Fifth Avenue in Manhattan. The 25,000-square-foot space sold NBA and WNBA merchandise and featured attractions including free video games and live game broadcasts.
There are seven NBA Store locations outside the United States. These include stores in Sydney and Melbourne in Australia, Milan in Italy, two in Beijing in China, one in Taipei in Taiwan, one in London in England, one in Buenos Aires, and three in South Africa and Metro Manila.
The NBA expanded into China largely because of the popularity of Chinese-born players Yao Ming and Yi Jianlian, combined with the momentum of the 2008 Summer Olympics in Beijing. Statistics showed that 300 million people in China played basketball and that the NBA was the most popular sports league in the country.
Notable visitors to the NBA Store include former President Bill Clinton and Ken Livingstone, who served as Mayor of London and received a personal tour from NBA Commissioner David Stern. The store is also regularly visited by NBA and WNBA players, celebrities, and tourists.
The NBA launched a virtual replica of its New York City store inside Second Life on the 1st of May 2007, during the NBA Finals between the San Antonio Spurs and the Cleveland Cavaliers. At launch, the NBA was described as the first professional sports league to establish a comprehensive headquarters in a virtual world.