Google search with option to save any interesting results to a temporary folder, and the folder contents refine search terms, search re-runs. Handy way to discover new things or target what you really meant.
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flightwise (formerly fboweb.com)
Five Filters: Explore Independent Media
Yahoo! Search API Tutorial
Gluestick PHP Wrapper for Glue
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Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.