The Union of South American Nations - why isn't this a big deal?

Yesterday twelve South American nations signed a treaty creating UNASUR: the South American equivalent, ostensibly, of the European Union. You can read a little about it here.

But, curiously, the summit got little attention. Why? I'm not sure. I'm also unclear why the death of the founder and leader of FARC has not made many front pages. The end of FARC, which his death may be prelude, may mean the beginning of a new era for Colombia and therefore South America. 

Changes are afoot in the Americas. When will the United States of those Americas start paying attention?