FaceBook page. Click on the Names Index box along the top of the page. Or, click on this link to go directly there.
This seems to be the same index that may be located via their archives search page. I'd blogged previously about their Text Collections index, which for my research has been much more productive. I still do not see the surnames on the Text Collections documents in their names index. However, the JDC should be congratulated on making their collections even more accessible.