These applications were announced many months ago. Discussed on here in some length, and lots of articles in the airlines websites as well as oneworld.com.
Not sure what you're looking for to help you out, but the alliance website should give you the info you are looking for: http://www.oneworld.com/home.cfm.
Also, if you're in the US not sure how they were implying saving miles to South America has anything to do with the three new applicants. Maybe I missed something.
I'm glad to see JAL join, in particular, due to my business and vacation travels. Royal Jordanian and Malev were bigger surprises for me, plus I've had no experience on them.
Glad to see some growth since a new participant announcement has been a long time coming!