If Walmart really wanted to polish its green cred, they would announce the installation of one or two chargers in every Walmart in America. That would be bold, gets lots of attention and press, and instantly create a huge charging infrastructure the public could relate to. I agree that they would also get people walking around their stores as a benefit, but, hey, it's a business, no?
There are 3,002 Supercenters, 647 "regular" stores and 164 Neighborhood Markets. See http://walmartstores.com/AboutUs/7606.aspx" onclick="window.open(this.href);return false; These would all be naturals for EVSE's.