Ogg (by Vorbis) is a new form of compressed audio file. But this is one of the best ever. Almost half the size of a mp3, tag included, and moreover it's free (a few people know it but you're
supposed to pay everytime you create a mp3, no matter what you record

).
It's compatible with most of the sound editors and players (Sound Forge, Winamp, Media Player...). I didn't find a decent decoder for Nero burning Rom, that's mainly why I stopped using Ogg Vorbis files.
