From what I understand, all domains with the words 'olympic' or 'olympics' are trademarked. Together are a number of others including all city-year or city-GAMES combinations.
Here is a list of trademarked slogans for the Vancouver 2010 Olympics
http://www2.parl.gc.ca/HousePublications/Publication.aspx?Language=E&Parl=39&Ses=1&Mode=1&Pub=Bill&Doc=C-47_4&File=51
What do you think would be the absolute best domain name for the Olympics in Rio de Janeiro that would not be a trademark infringement?
Here is a list of trademarked slogans for the Vancouver 2010 Olympics
http://www2.parl.gc.ca/HousePublications/Publication.aspx?Language=E&Parl=39&Ses=1&Mode=1&Pub=Bill&Doc=C-47_4&File=51
What do you think would be the absolute best domain name for the Olympics in Rio de Janeiro that would not be a trademark infringement?