Has anyone written an interface through which i can get a citation of a book/paper from [amazon.com](http://amazon.com)

Thanks for the suggestions from fellow users. I'm updating the questions to detail in more specifics:

* Citeulike.org issue: I used BibTeX "Export from My library" features. However its not that accurate..it cannot extract all meta-data from amazon and complete the bibliographic reference
* Mendeley Desktop : I used <http://www.mendeley.com/blog/academic-features/mendeley-bookmarklet-released-one-click-import-from-google-scholar-pubmed-arxiv-acm-ieee-etc/> is a long way round, I want something where I give the URL and it gives me back the bibtex entry