On twitter today I found a web site where you can publish your Etsy Coupon code. I do not know how it works but I did put my Christmas in July sale coupon on the site. Here's the link http://etsycouponcode.com/coupon.php?id=6506
I do also put my coupon on Twitter and Facebook and the "My Etsy" on facebook http://www.facebook.com/home.php?sk=group_181122541737.
By the way, my coupon code is cijs2011 and is 10% off any items in my shop. http://www.etsy.com/shop/mishap1165
Also put my coupon on the Indie discounts which is another place to publicise your coupons.
Just a couple of places to use your coupon code. If anyone has others, just leave a comment.