National Geographic has an interesting article about NASA's plan to open up the moon for commerce. Although any such activity is a long way off, NASA sponsored an event about this last spring and invited 180 entrepreneurs, business leaders, government officials, and space scientists. Just so there's no confusion, this goes beyond exploiting resources found on the moon; they're talking about building and opening up stores...
Said Paul Eckert of Boeing, "When we talk about commerce on the moon, it's not just contracts where the government buys services. We're also talking about businesses selling to each other and also to consumers."