Just a comment on first lines. When I hear a song performed, particularly when unaccompanied, the singer often starts singing when my brain is not tuned in. It often takes until the second line before I am actually aware what is being sung. As a result, I do not actually know the first line of the song.
I have often thought that listing by second line or last line would make a song lyric easier for me to find.
By the way - I was very impressed by the speed which Jon Freeman's rough demo gave displays of song lyrics and ABC versions of the tune.
Quack!
Geoff.