It looks like Ensidia has claimed the world first defeat of Yogg-Saron in 25-man Ulduar. You can find the full loot list over at MMO-Champion, which includes a Fragment of Val'anyr, part of a new legendary one-hand mace. You need 30 of these things to form Val'anyr, Gavel of Ancient Kings.

Ensidia is known for clearing end-game content quickly, but what are your thoughts on the kill?

Also, as Boubouille noted on MMO-Champion, the "loot ilvl isn't higher than the one on the other bosses. It looks like Blizzard wants players to run hard-modes for the higher tier of gear and not just complete the instance in easy mode." What do you think?