for a in *
do
       OUTF=`echo "$a" | sed s/\.flac/.mp3/g`

       ARTIST=`metaflac "$a" --show-tag=ARTIST | sed s/.*=//g`
       TITLE=`metaflac "$a" --show-tag=TITLE | sed s/.*=//g`
       ALBUM=`metaflac "$a" --show-tag=ALBUM | sed s/.*=//g`
       GENRE=`metaflac "$a" --show-tag=GENRE | sed s/.*=//g`
       TRACKNUMBER=`metaflac "$a" --show-tag=TRACKNUMBER | sed s/.*=//g`

       flac -c -d "$a" | lame -m j -b 128 -s 44.1 - "$OUTF"
       id3 -t "$TITLE" -T "$TRACKNUMBER" -a "$ARTIST" -A "$ALBUM" -g "$GENRE" "$OUTF"

done


Just my personal conversion script :)