Sephora Friends and Family runs through 11/2, and with code FF2009, you'll save 20% on pretty much all your online purchases. And don't forget to go through ebates for an additional 4% back.
I couldn't resist this awesome set of polishes, available to Beauty Insiders only (sign up if you aren't already a BI!). The set is $38 and includes Sample Sale, Worth My Weight, Meet for Drinks, Queen of Everything, Shopping Frenzy, and Domestic Goddess. 20% off made this a great deal.
Remember, shipping is always free at Sephora when you spend $50, and you always get 3 free samples and they offer free returns as well.