http://www.uesp.net/wiki/File:PS22.png After completing the quest http://www.uesp.net/wiki/Skyrim:Loud_and_Clear, if the player does not ask Brynjolf why Maven Black-Briar is requesting a meeting, the quest will not become available. Also Brynjolf will not speak to the player, saying only that he has "important tasks to be doing".
According to UESP, this is a PS3 bug.
Unfortunately that is misinformation, well not entirley but mainly the quest not starting is due to a different reason, the reason ill explain is way more common, ive bern dealing with this for over a month. I along with tons of other people have tried it every way possible and nothing works.
It's actually do to breaking in some place before hand. I forget where, it'd the honningbrew brewery or something like that. We know this because people using console commands can fix it by unbreaking into the place.
Anyway there is good and bad news. Good news is the next patch fixes this issue. The bad is if you already turned in loud and clear and went to play without dampened spirits starting then it will probably never start. You have to had saves before turning it in so when the patch comes out you'll be able to turn it in then proceed with the dampened. Basically the patch fixes the issue but doesn't automatically start dampened spirits if you already left without it starting. Although there is rumors that you can go back and talk to byrinoff and he will engage in conversation which will lead to starting dampaned spirits.
You will just have to wait and see when the patch comes out.
http://www.uesp.net/wiki/Skyrim:Dampened_Spirits