Different working examples of smart spiders:
Updating business listings from yellowpages.com used for area information.
Updating property addresses for real estate listing search engines.
Updating hotel reservations and airline flights for travel search engines.
Updating db for new businesses from chamber of commerce websites used for mailings.
Updating db for new real estate agents from public license files used for mailings.
Updating db for U.S. census data from census.gov used for area information.
Updating db for local school information from nces.gov used for area information.
Consolidating user account data from various web interfaces into one web
interface such as financial information.
Still more uses for these types of spiders are being discovered as new uses for
the web emerge.