In case you haven't been following this, BFI has a list of the Keystone Films that have been restored and films still needing work. Click this link for the list. (This list has been last updated in Sept. 2006)
And if by chance you missed the ABC report about the restoring of these films (over a year ago), you can watch again at this link.
Once these films are restored the report plan is to create a DVD collection.