As Salon pointed out to me, the wonderful folks at the Internet Archive have 150 tracks of Caruso singing – part 1 and part 2 – turned from 78s into MP3s. Download what you like before some idiot lengthens the term of copyright even more and it goes out of the public domain again…
And along similar lines, I was encouraged to learn that the BBC’s recent experiment with free Beethoven downloads garnered millions of downloads – many more than any commercial single sales.