I am not a fan of Walmart. Never have been and probably never will be given the ownership, business philosophy, employee management practices, and overall bullying attitude. I maintain my own personal boycott of the store and am willing to pay more at even a different chain than enter one of "those" places.
That said, they have done something I have a hard time complaining about. They built a green concept truck pushing the limits of technology for improving fuel efficiency and effectiveness.
Now, I have no doubt that it will be used for the embodiment of evil that Walmart exudes. But - if they do put this into use, they might just have contributed a bit of good to the world despite their intentions.