We also need a Digital Ocean DC here in Brazil. Actually we don't use DO for our production servers because of the latency, problem that would be solved using server in the country.
+1 for a DO datacenter in Brazil.
We understand the difficulties of opening DCs abroad, but it seems that Equinix is a partner of DO and it has a datacenter in São Paulo and will open another in Rio in 2015 (ALOG was bought by Equinix).
Anyway... it seems a huge opportunity. Most providers in the region do not offer any kind of self service interface, you have to contact them to create a new install, to destroy an install, even for shutting down the machine.