I use fatwallet, slickdeals, and retailmenot. For awesome local deals I use Groupon: http://www.groupon.com/r/uu1496556
It's not coupon codes, but it's awesome deals.
Ebates - It's easy to use, has over 1000 sites that I already know and trust ( like Wal-Mart, Bluefly, Piperlime, Banana Republic, Ann Taylor, Bloomingdale's, etc.), and gives me cash back for shopping - this weekend I got 10% back on the jeans I bought from the Gap, plus a free shipping discount code!