The Latin American Public Opinion Project (LAPOP) at Vanderbilt U. offers its AmericasBarometer Insights series of reports online. "This series of short studies is based on over 38,000 interviews in 23 countries of the Americas in 2008, including North America, Central America, South America and the Caribbean. The Insights series will not only present data and explain the factors that produce variation in opinion among individuals and across countries, it will report on policy implications of those results."
Yale users have access to the data from these surveys, since Yale is a LAPOP Data Repository.