Fatboss TV - Instructional raid videos hosted on YouTube.
Tankspot - Instructional raid videos.
WoW-Heroes - Is your toon raid ready? Check here!
WoW-Pro - Raid, instance, and other guides.
WoWProgress - Realm, guild, and character rankings.
- The Addons and Customization section for sites with helpful addons for raiding.
- The How-To on using Ventrilo (a.k.a. "Vent"), which is required for guild raids.