Unless it is not obvious, Mp3taglib is dead. It was a id3v1/id3v2 mp3 tagging library for ruby, based on the id3lib C++ library. Use http://rubyforge.org/projects/id3lib-ruby/ instead. Same basic principle but alive!
Commercial Use
Modify
Distribute
Place Warranty
Sub-License
Hold Liable
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.