Anyway, a QuickTime Components project has been started at Sourceforge, focusing on QT development of popular open source audio and video components. Their first project integrates Ogg Vorbis encoding and decoding into QuickTime (with a plugin a la divx or 3ivx). This is great news because conversion to/from ogg vorbis is done simply through qt player's 'export' function and ogg vorbis files will now play in iTunes! The files must be renamed from .ogg to .mov though.
The downloaded .qtx file goes into the /Library/Quicktime/ directory (like DivX); it is an import/export and playback plugin for Quicktime Player. Just open up a sound/music file in QT Player, choose export, then select Ogg Vorbis in the formats menu. The only option in this process is the quality slider. Even though the plugin is in the early stages of development and contains a bug or two, overall performance (including encoding and playback) is quite excellent; Vorbis is truly the MP3 killer.