INDENTIFYING INFORMATION SOURCES TO SEARCH BASED ON RULES

Various embodiments of the present invention relate to systems and methods used to search for information (e.g., from multiple sources). In one example (which example is intended to be illustrative and not restrictive), such systems and methods may select a subset of available relevant Internet information sources, such as suppliers and/or purchasers of goods, services, and/or commodities. In another example (which example is intended to be illustrative and not restrictive), a system and method are provided for determining when to launch an information search and for determining the set of information sources to search.