My buddy was playing, and he's almost done with all the thieves guild quest's (not just the main quest, but all side quest's) and he was telling me that you get 3 or 4 NEW vendors after you do so many side jobs, and also he randomly saw a new recruit join, and mention to him he "heard the guild was up and running smoothly again" and decided to join.
I had no idea these things happened, it makes me want to re-do the thieves guild (I had it glitch before I could go into the nightengale place on my first play through, and havent even started it on my 2nd character @ lvl 43)
I heard so many people complain that the Thieves guild, I wonder if anyone knew stuff like that happens?