Corrosiveaffy on WoW LJ wants to know if there are any good ideas out there for guild ranks, and I can tell her that there are tons. There's the standard "rookie," "officer," "raider," and "veteran," but it seems like some guild ranks are even more creative than the guilds they're named after. I've seen all kinds of stuff, from "larva," "pupae" and "queen," to the old "padawan," "jedi" and "master" mentioned in the comments. One guild I was in way back just had two ranks: most people were "peons," and the GM was the only "king."
Usually it's funniest when they tie into the guild's name somehow -- I like the example of "The Nouns of Adjective" from the LJ comments, where the GM is called the "Pope of Punctuation." I know there are some more excellent ones out there, but whenever people fish around for them, they seem a little hard to come by. What are some of the best guild rank names you've seen?