pegboard is a social bookmarking service that lets you save, search, share and tag your bookmarks with people all over the world!
JSON Data API documentation from the chicago schools report.
census.ire.org's JSON API documentation
Solutoire.com on how one might get a JSON object to include functions.
A JSON read-only API for accessing information within the CrunchBase directory.
Yahoo!'s "Build your Own Search Service" opens up a JSON/XML api for search results.
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