Michael Arrington is reporting that the AOL Games Group may be getting ready to launch a social network for World of Warcraft players, since the company owns wow.com. Could AOL’s reach make wow.com a category-killer? Sean Fanning’s Rupture, another WoW socnet, hasn’t particularly taken off, as I understand it. New entrants to virtual world social networking include Koinup as well. More on the subsector at GigaOm.