Hello, this was killing me as well. I saw this commercial yesterday (twice while watching NBC primetime) and remembered hearing the music in the movie Babe. After a couple of hours of google-ing etc, I think I found the answer. It's Edvard Grieg, part of his Lyric Pieces, more precisely Lyric piece No. 28, Op. 47, No. 6. I could be wrong, and Grieg-o-philes of the world correct me if I am wrong, but I believe that the Lyric Pieces collection was originally written for piano, so the version in the commercial (and in Babe) may be an orchestrated version. I dl-ed a .pdf of the sheet music from an obscure website, and from my (somewhat rusty) music reading, it seems spot on. Hope this helps!!