i like this part of the Vobis.com FAQ:

Does Vorbis completely replace MP3, or is it just a complementary codec?

"Ogg Vorbis has been designed to completely replace all proprietary, patented audio formats. That means that you can encode all your music or audio content in Vorbis and never look back."

..i hope to see all of Xiph continue to grow. music encoded with Vorbis sounds and feels more complete and full than any other; it's faintly palpable.