The Mexican Peso, Brazilian Real and Russian Rouble are under strong pressure - that will help in exports, but of course be bad with regards to multi-nationals originated in the emerging markets, or those who manufacture based on imports. For US based multi-nationals with largely free activities in such emerging markets - it is very helpful and helps keeping their costs down in these difficult times.
I see the USD strengthening as a mix of repatriation and an attempt to buy time for acting in the markets.
I think - at least for Brazil - they are quite comfortable, even used to such volatility. Brazil is very closed off with regards to doing business here though, and difficult to get money out from the country.
