this sounds kind of interesting….

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Indiana University recently released the Variations digital music library system as free, open source software. http://www.dlib.indiana.edu/projects/variations3/oss-webinar.html

Trial version of the Variations client software is available here (as well as a link to a browser-based streaming audio player:
http://www.dlib.indiana.edu/projects/variations3/tryout.html

For more information about the project:
http://variations.sourceforge.net/