Anthropologie: 30% off camis, slips and sleep sets.
Forever 21: 11% all regularly priced items on 11.11.11. Use code ONEDAY11 at checkout. Also, all sale items are buy one get one free in store only.
Pottery Barn: Up to 60% off select items.
Banana Republic: 33% off Women's styles 11am to 10pm on 11.11.11 (online only). Use code BRELEVEN at checkout. Also, if you are on their email list (and maybe have a BR credit card?) you get a Secret Sale code in your email that is good for 30-50% one full priced item. The code is only good today and tomorrow (11.11.11 and 11.12.11) and you don't know how much you save until you get to the register.
Victoria's Secret: Cotton underwear are on sale 7 for $26 (normally 5 for $25). This sale is good until 11.14.11. Also, for every $10 you spend through 11.30.11 you get a Secret Reward. This is a gift card good for between $10 and $500. I got several of these last year and they were a great way to get my Christmas shopping done! Unfortunately, you don't know how much your reward is worth until you check out. However, if you are nice to the sales staff, they will let you go back and get more stuff if your reward is more than you expected.
Lilly Pulitzer: You receive a free magnet frame with any purchase. With a $250 purchase you also get a limited edition cuff bracelet and with a $500 purchase you also get a jewelry box.
Ann Taylor: 40% your entire purchase if you mention the post here. This is good for the Bridgewater Commons Mall in New Jersey. I wonder if all Ann Taylor stores are having this promotion?
Payless: Buy one item, get one item half off.
Kohl's: Get $10 Kohls cash for every $50 you spend. Everything is always on sale at Kohls, so check their website for specifics.
The Limited: 40% off your entire purchase (including sale items). Use code SAVE40 at checkout. I am not sure if this promotion is also good in stores.