We will be resetting the Diablo II ladder on March 23 with the release of patch 1.13. We anticipate all Diablo II realms to be down for approximately six hours during the reset. More specific information on realm availability on the day of the reset will be posted in the Battle.net Status forum. When the ladder is reset, all existing ladder characters will be converted to non-ladder. All characters and items being converted to non-ladder will remain intact, but once converted these characters will no longer have access to ladder content such as creating ladder-only rune words. For more information on ladder characters please visit the Arreat Summit Realm Character Types page at http://classic.battle.net/diablo2exp/basics/charactertypes.shtml

arreat summit info : http://forums.battle.net/thread.html?topicId=23766799033&sid=3000