While probably not of much interest to academic economists, this site pulls together a very wide range of information (more than a gigabyte) from more than 25 U.S. government agencies that will be of interest to firms wishing to export from the U.S. Obviously, it contains a substantial amount of material that may be of interest to those interested in non-U.S. countries. One can even search the entire database with natural language requests.
http://www.stat-usa.gov/BEN/Services/ntdbhome.html