AccessDenied.Net Gamer Database - Searchable database, with entries from all over the world. Covers computer PBEM, computer network, board games, roleplaying games.
B.Y.O.V. - International group, based in Wisconsin, US. Includes list of scheduled convention events.
Steve Jackson Games: Gamer and Store Finder - Searchable database, with entries from all over the world. Contains information on games played (board games and roleplaying games, from SJG only). Registration available.