I've been tweaking a book recommendation engine for twitter. The algorithm is based on tf-idf of words in a user's tweets. Relevant words are extracted then fed into the amazon api.
Would appreciate feedback.<p>http://foxblot.com/<p>sample recommendations:
http://foxblot.com/pgraham
http://foxblot.com/barakobama
http://foxblot.com/fredwilson<p>the recommendations would get much better if I used phrases instead of words. All feedback appreciated.