Zachariah said:Audacity: Free Audio Editor and Recorder can do it, but probably only one at a time, and not as a batch (which is what you'd want)
Too bad iPod can't just play OGG already --- that would save you the transcoding
Convert oggs to mp3s, converting ogginfo tags to id3 tags. Requires: ogg123, ogginfo, id3tool and an mp3 encoder, and nothing else. I've had a bug report that this might be limited to 48 minutes, I'd love more info on this.
I can't believe no one has recommended this. This is perfect for all your converting and ripping needs. Have been using it for quite a while.
http://sbooth.org/Max/#max