files are completely free (public domain; CC0 license).
The Goldberg Variations for Downloading
Dave remarked, "I now find that I enjoy my MIDI version almost more
than recorded versions. I get to decide how the phrasing should be."
These recordings from MIDI might not be everyone's cup of tea, but I
have found them tremendously enjoyable to listen to and helpful as a
reference from which to appreciate other interpretations.
I'd be interested in any feedback. These links are good as of 8/17/2012. Email me if these ever go out and I'll update them or send the files to you direct.