Amazon.com Citations

Cool new Amazon feature: Amazon.com Citations.
Amazon scans every book in the Search Inside the Book program looking for phrases that match the names of books in our catalog. We make a note of these "citations" and display them to you...
For example, a book I'm currently reading—Moral Animal—contains references to 96 other books. This feature can help situate books within a larger context than the Customers who bought this item also bought-list can. I hope they make this data available through the API so we can see some Touchgraph maps of book-citation connections.

And they should start scraping the URLs mentioned within books too. And while I'm wishing, how about citing weblogs that cite books? ;)

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TouchGraph browser for Amazon Citations
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