I'm always on alert for songs over 15 minutes or under 20 seconds. I found this band called The Red Krayola. I got an album called "God Bless the Red Krayola and All Who Sail With It" It's mostly experimental rock from 1968. Looking at Wikipedia, I found that they made some more albums, one which has a song of 15:02. My album I bought has a song that's 4 seconds long (technically it's 8 seconds, but the CD back lists it as 4 seconds.) So this band could be on both the short song list and the long song list. I don't know of any other band that has this dubious honor, although if there were any, the number would be few. Well, anyway, I've been collecting a list of songs under 20 seconds long. You can look at it here: http://www.atari2600land.com/shortsongs.html and please feel free to let me know if I can add any I don't have yet.