Server Ranking
 

Scarlet Crusade Self-Reported Progress Tracking
WoWProgress Rankings
WarCrafter Rankings
GuildOx Rankings

DISCLAIMERS: These sites all take time to update, so we may be further in progression than it shows. GuildOx bases all their rating off of achievements earned by the guild and may be one of the most accurate systems, except for tracking boss kills that aren't tied to an achievement (although this seems to be better with the new RSS from Armory showing individual kills).

Ultimately, guild rankings are just for fun.