@Paul great work with your site. How about adding an xml file to your web root that describes each library in the same or similar way to @beo6 xml system.
Ok, I did it, more or less. Here's the XML:
http://www.pjrc.com/teensy/td_libs.xml
I took a few liberties with the format, like adding a documentation tag for links to web pages that document the library. I also put text in the category, since the id numbers don't mean anything to me. I probably made mistakes. Even the xml may not be perfect. Let me know what you think?
I might add an option for a link to an image, for those libraries where I have an image of the hardware. Would anyone use that?
Not every library has a zip file. I add those after I test the library with Teensy. Hopefully this list will be useful anyway? As I continue my effort to test all substantial Arduino libraries, this list will fill in with more files and better info.