As a fan of Moira, the Wildhammers and the overall dwarf story arc, I was rather put out that Magni was simply gone. In game, we didn't get to see the events of The Shattering that led to the current state of dwarven politics. On the patch 4.1 PTR, it appears that Old Ironforge has been opened for public viewing.

Magni Bronzebeard stands, still petrified, next to several extremely large tomes, and is attended by Advisor Belgrum and Honor Guard Dunstan. Advisor Belgrum used to be located in the Halls of Explorers, and his dialogue indicates that he feels he is to blame for Magni's current predicament. Belgrum was involved in the events of the Shattering, helping to translate the tablet that led to Magni's eventual petrification, and heading up the interim goverment prior to the Council of the Three Hammers. Honor Guard Dunstan appears to be a new NPC (unless he is related to a certain mountaineer.)

Gallery: Old Ironforge