WoW Guide: How to activate Ulduar's hard modes

You may have heard that a number of guilds have cleared Ulduar to Yogg-Saron already, which to me is perfectly fine. I like to think that a lot of good, properly-coordinated guilds will kill Yoggy this week, and the Blues agree with me. Of course, this week's Yoggy kills were on the easiest possible difficulty, so world first or not, it doesn't mean a whole lot in terms of fame and fortune.This