Feline Pine Mail In Rebate Offer

I'm always looking for coupons and mail in rebate on kitty litter, and LOVE when I can get litter for FREE!   Feline Pine is offering mail in rebates for new users of their product.  Get a FREE 7 lb bag of their original Feline Pine or a FREE 3.8 to 4 pound bag of their scoopable variety.  The best part of this is, the PDF files say they don't expire until 6/30/2011!!