Finally got around to committing Christy Kuo's (cyk2) COMP517-03B (Digital Libraries) project: an Ogg Vorbis audio plugin. Thanks Christy!
I've modified the plugin somewhat to use a Perl-only module (Ogg::Vorbis::Header::PurePerl, from CPAN.org) to read the Ogg Vorbis file comments and information, instead of relying on having an external program installed.