I think Walmart is doing a great job with their online presence of late and I've seen articles about local delivery experiments they were performing. There was

I think Walmart is doing a great job with their online presence of late and I've seen articles about local delivery experiments they were performing. There was an article on HN some time back about Walmart basically paying their employees to deliver packages on their way home from work. It got a lot of negative feedback, but it's clear they're willing to experiment and try new ideas. They've also introduced some really great free shipping policies which compete well with Prime, but don't require a subscription fee.