Bulk convert iTunes m4a files to mp3's

I knew that I didn't have all my home music files on my work computer. I thought that something had gone wrong with the transfer, it didn't occur to me that it wasn't in a form that WinAmp couldn't read it.

Long story short:
find . -type f -name "*.m4a" -exec ffmpeg -n -i {} -codec:v copy -codec:a libmp3lame -q:a 2 {}".mp3" \;