They are also supposed to open one in Minneapolis.
This is the only thing I found on the web:
http://www.mattel.com/careers/ca_work_boston.asp
American Girl's retail locations include three flagship American Girl Place retail and entertainment sites in Chicago, New York, and Los Angeles and the American Girl stores in Atlanta and Dallas. They are designed to celebrate all that's special about American Girl girlhood: providing a magical destination where girls can make memories that will last a lifetime with family and friends!
The American Girl stores provide opportunities for American Girl fans to experience the brand in a fun, casual environment and celebrate special times together. The American Girl store in Boston - slated to open in November 2008 - is 20,000 square-feet and is located at the prestigious Natick Collection, the largest mall in New England.
Designed as the ultimate place to celebrate girls' birthdays and other special occasions, the store features separate party rooms where girls and their friends can enjoy American Girl-themed parties, complete with organized games and activities, favorite foods and cake, American Girl decorations, and party favors.
American Girl also carries a rotating selection of the company's popular dolls, outfits, and accessories, as well as a variety of its best-selling American Girl books. In addition, American Girl fans can treat their dolls to a new 'do in the Doll Hair Salon and enjoy brunch, lunch, dinner, or an unforgettable dessert in the casual Bistro. Various girl-and-mom-friendly programs and classes are also offered at the store throughout the year.
The talents of many individuals are needed to make a girl's visit to American Girl a special one. Individuals interested in obtaining retail, Bistro, or event positions in a dynamic environment can find many opportunities to display and develop their talents at American Girl.