So we all know that Facebook and Google know a LOT about their users, almost disturbingly so. But another, even bigger company may know even more about their users, and they're a lot better at using that info to get them to spend money.
Millions of people shop at Wal-Mart every year, but what if Wal-Mart delivered? It's an idea that is being kicked around. Read more and get details after the jump.