Via Guildox, we've just gotten word that Gentlemens Club of Korgath-US, Hordeside, has just become the world-first achievers of Herald of the Titans. This achievement requires that you defeat Algalon on 10-man difficult with no gear above iLevel 226. In other words, they were not wearing a single piece of Hard-mode Ulduar 25-man gear (While we haven't looked closely at their armory, the achievement would allow for normal mode 25-man gear, though even normal mode 25-man weapons would be off limits). [EDIT: iLevel 226 is actually the item level of gear from Normal mode 25-man Ulduar, not Hard mode as previously stated. It is also the item level of gear that drops from Heroic or 25-man Malygos, Kel'thuzad, and Sartharion with at least 2 drakes up. Hard mode 10-man Ulduar also drop iLevel 226 items, which indicates that the Achievement is intended mostly for 10-man progression.]
While 10-man and 25-man raids were technically meant to be seperate tiers of progression, it seems like many raiders freely mix the two, and while that's certainly to be expected, and there's nothing wrong with it, it's cool to see at least a few guilds focus on mastering that path of progression and arguably challenging themselves to at least the 10-man Algalon fight as Blizzard meant it to be fought.
In short, they've managed to proclaim themselves Kings of the 10-man game in Patch 3.1, even if other guilds technically beat them to 10-man Algalon kill itself. Congratulations to everyone involved in the raid!