The official tourist board websites for the  U.S. Virgin Islands, the main islands of St. Thomas, St. John, and St. Croix, are   and more recently     From their home pages you can click on the island that you are interested in learning about.  From there you can choose information about accommodations, dining, sports, attractions, tours, transportation, culture and history.  The sites also have up to date island news, information on the arts, shopping, golf, beaches, and group travel planning.  The group travel section has a separate page for weddings. 

As for the East End area of St. Thomas in particular, the site lists East End hotels and attractions and has maps of the island that allow visitors to the site to located things in the area, but does not allow for for searching for information on this part of the island specifically. East End does not have its own tourist board.