http://www.popsci.com/popsci/aviationspace/bdd2aa9fff7f6110vgnvcm1000004eecbccdrcrd.html
This, in my opinion, is rather extraordinary. However, if we ever manage to colonize the moon there will be land disputes like no other between all the countries. But that's far into the future, we will need to manage to set this up first before we worry about colonizing.
You've been able to buy real estate on the moon for a while: http://www.lunarregistry.com/info/faq_a.shtml