I've got a game in a week and a half and just got asked via email if there are any thieves guilds in Sigil my friends TN thief/mage tiefling could contact with an eye towards joining. I've drawn a blank.
I guess it would also be awesome for any information about outer planar thieves guilds. Not after really detailed info, just anything off the top of your head.
Cheers
I think there was group of good aligned thieves who specialize in stealing from fiends, Baatezu in particular.
They had its own prestige class detailed in "Fiendish Codex 2: The Tyrants of Nine Hells".
Alas, apart from that I dont remember much detail.
One-eyed, one-horned, flying, purple people eater says: "Monsters are nature's way for keeping XPs fresh."