I just saw this from Coinstar
http://www.coinstar.com/us/html/2009Promo
You can turn in $40 in coins and get $50 in gift certificates. If you regularly shop at any of these stores this is a nice little profit when you turn in your coins.
Amazon
Borders
Cabelas
Eddie Bauer
iTunes
JCPenny
Lowes
Old Navy
Overstock.com
Regal Entertainment Group
Starbucks
Rixty
I have turned in coins for Amazon and iTunes before and you get a code at the bottom of your receipt to enter online at that site to get your credit. The last time they did a promo like this you filled out a form also at the bottom of your receipt and mailed it in. A few weeks later you got a $10 gift card in the mail to the same place your original gift card/code was for.