Starts 4/18/10. I don't know how long it runs. Complete info will be in their 4/18/10 circular. Five plastic bags get you $1 toward a reusable bag. You can choose any bag they carry, but the regular Target one is $.99 making it free. You can bring the 5 plastic bags to Target or send 5 bags to:

Terracycle
121 New York
Avenue Trenton, NJ
08638

99?? Target Reusable Bag