So I live in the past, whatever. Most of my music collection files are still mp3s, with a few oggs here and there. Jen had a free $25 gift card to iTunes, so I bought an album that Amazon nor my “russian connection” had on their list. I felt so dirty, but it had to be done. Anyway, if you want to convert m4a files to mp3 from the command line, run this:

for i in *.m4a; do faad -o - "$i" | lame - "${i%.m4a}.mp3"; done

Diggity done. Obviously, make sure faad and lame are installed. Re-tag and you are all set.