As part of the Great 78 Project for preservation, research, and discovery of 78rpm records http://great78.archive.org ...
Over the next couple of days the next batch of 78rpm transfers are being uploaded. The most-recent-first listing is here:
These are mostly from the Barrie Thorpe Collection from Batavia Illinois Public Library Collection
For addicts (like me), we are working on a twitter feed of new uploads to the Great 78 Project: