Second this. Walmart is definitely milking their brick n mortar advantage here and Amazon even followed suit, they used to have free shipping w/out Prime for anything over $55 or $50 I think, then as soon as WalMart did > $35 for free shipping, Amazon followed suit.

If anyone can derail Amazon at what most people need, it's Walmart. Obviously, WalMart isn't a tech outfit like Amazon, but with a few choice acquisitions (e. g. Jet :), and ramp up time, they will certainly have Amazon wondering what hit them really soon... Walmart needs to do a better job of advertising their online offerings though.