Blizzard has unveiled their official site for the Diablo II Expansion Set, which oddly enough appears to be titled "Diablo II Expansion Set" for the time being. The site contains a collection of screenshots from the add-on, as well as some new desktop images and preliminary information about the new classes and monsters and a brief FAQ (which includes the all-important question of whether or not people with the expansion set will be able to play against regular Diablo II users).