datasets

This site links to various dataset across the federal government.

www.Data.gov -- repository for data and geodata from across the federal government, searchable by agency, data type, keyword, among others. Many, but not all Commerce data sets reside here.

http://www.data.gov/metric

Data.gov Commerce Data and tools can be found at

Data
http://www.data.gov/list/agency/1/0/catalog/raw/page/1/count/50

Tools
http://www.data.gov/list/agency/1/0/catalog/tools/page/1/count/50

Census Data – Population, household, housing, demographics. Economic census and monthly indicators, foreign trade, employment statistics, maps, geographic data and more. http://www.census.gov/
http://www.census.gov/main/www/access.html

List of Open Data Sites Around the World: http://www.data.gov/opendatasites
Amazon Listing of Public Data Sets: http://aws.amazon.com/datasets
Washington DC: http://data.octo.dc.gov
New York: http://nyc.gov/data
San Francisco: http://datasf.org/
U.K.: http://data.gov.uk/

http://www.cs.cmu.edu/~awm/10701/project/data.html