There is a coupon website called http://www.couponaid.net
This site has bunch of coupon code, special offers, discount deals, and more on many merchants like walmart, tagret, dillards, macy's, buy, gap, oakley, build a bear, and many more popular stores.
This site also updates new and expired coupons on timely manner to filter out all the expired coupons to save browser's time.
This site even has blog and you can make your own blog account under couponist tab. You can submit your coupons, share and exchange coupons with others.
Only thing left is that it would be nice to have a coupon forum or something. :)