Icecrown Citadel cleared with blue-quality gear.
The guild "Undergeared" demonstrates what is possible with lower quality armor.
For those who may not know Gevlon, creator of the Greedy Goblin blog, has taken on the challenge of trying to clear as much WotLK raid content in possible while only wearing blue (rare) armor, with minor exceptions. His guild “Undergeared” of EU-Arathor spent much of the spring and summer clearing content despite the self-imposed handicap.
However as the summer has dragged on the group has fizzled somewhat, as many guilds do. They are planning one last attempt to clear some additional content this coming week, but other than that it appears this great experiment is coming to a close.
So what is the end result? The guild ended up clearing a large portion of the game’s 10-man content. Barring some additional success in the coming week; the group ended up clearing 8 out of the 12 bosses in Icecrown Citadel, including the first wing, plus Rotface, Festergut, Valithria Dreamwalker and Blood Princes. All of Trial of the Crusader and Naxxramas encounters were cleared, and all but two bosses in Ulduar (Yogg-Saron and Assembly of Iron). In addition they also cleared all of the 5-man heroic content.
Interestingly enough the group found the Trial of the Crusader (ToC) raid to be easier than Ulduar wearing the same gear, despite the fact that ToC was released later in the expansion. Whether or not they clear any additional content, the guild went a long way toward showing what a sufficiently skilled group can accomplish; kudos to them.