We strongly recommend the web site of The Wall Street Journal. While it's a subscription-only site, the cost ($59 per year) is relatively small compared with the useful information provided. The Journal provides well-written articles by its own staff as well as news items from Dow Jones and AP. While we find the design somewhat confusing, regular users will quickly be able to navigate to the appropriate sections. 

The Financial Times provides a good complement. While its typical reports are shorter than the Journal's, the FT provides coverage of more countries -including the smaller economies (Central America, Bolivia, Ecuador) not covered by the Journal and most other business media. The design is good and navigation easy.

Another very good source is Bloomberg, which provides updated information from the top economies. We especially recommend this source for following breaking news and hour-to-hour changes, like we've recently seen in Argentina and Venezuela.

There are also several media specializing in Latin American business. One good resource is Business News Americas, which provides extensive information by industries - very useful for quick searches on a given sector. Another good source is Latin American Newsletters, which provides extensive political commentary as well. And Latin Trade, the magazine on business in Latin America, publishes its content on the web for free.