I became an Amazon Mom member about a month ago. It's a pretty sweet deal. You can save 30% on select diapers and wipes (we use Pampers Swaddlers - I can get 204 for just $32.19 by setting up automatic shipments), and you automatically get 3 months of Amazon Prime for free (so, free 2 day shipping!). And for every $25 you spend in their Baby Store, you earn another month of Amazon Prime, up to a year. I've already taken advantage of the free 2 day shipping on some of my orders. We also subscribed for the diapers to save the 30%.
That's another savings that Amazon offers - Subscribe & Save - 15% off when you set up automatic delivery on certain household and grocery items, and it's free shipping too. We used to subscribe for Pop Chips. You can skip shipments if you don't need the item when they're ready to ship out, and you can cancel at any time.
I already loved Amazon for their free shipping for orders over $25. Now I love them even more! ;)