Go to Diapers.com, use $10 off $49 coupon DEALPLUS for your first order.
Free shipping on orders over $49 (before coupon applied).
also, there is a $14.97 mail in rebate available (for new customers only): http://www.diapers.com/helpcenter/parenting.htm
They also list manufactory coupons on their website so do not forget to
click them when you order (like $1.5 or $2 for pampers and huggies)
Bing also has 3-10% Cash Back for Diapers.com.