Infochimps.org

Just a shameless plug for the site. At infochimps.org you can buy, sell, or share any data set in the world. Whether you're looking for baseball statistics, historical stock market data, a just a simple spreadsheet to finish that report, you can find it at infochimps. Infochimps is a data marketplace. So, if you have any spreadsheets or other data lying around, you can either sell it or share it on infochimps. Check it out.