The production company has moved from Rio to an area called Paratay where the Isle Esme scenes are to be shot. The cast arrived at that location via helicopter.
Specifically the scenes are shot on the island resort but the cast and crew are not staying on the resort because it is not able to handle overnight accommodations for such a large team of people. The cast and crew are at a site off-island and brought there each day. Yesterday was a travel and rest day due to the overnight shooting in the Lapa District the night before.
The navy is providing security for both the inn where the cast is currently staying and the filming site. Apparently people have tried to access both sites and have been turned away. It seems that no one is able to be closer than 200 yards in either case. There is at least one major Brazilian entertainment outlet that has rented a boat and is at anchor at the established 200 yard perimeter. Whether or not they will be able to capture any footage besides arrivals on the island is unknown.
The consensus seems to be that filming starts this afternoon, but that info has changed several times.
TwiBlogBrasil has a good rundown with great translation.
(potential *Spoilers* below the line)
The following is rumor via various news sites and Twitters out of Brazil:
•There is some speculation today that there will be scenes shot at a local waterfall.
•Other rumor on Twitter has a scene involving dolphins
•There were confirmed deliveries of goose feathers to the island
•The furniture that comes with the resort was moved to another room so it would not be damaged and they have brought in other furniture.
All Above Information and Pic came from Twilight Lexicon: Source