Add threaded comments support to FieldtypeComments. This is the first item on a group of updates to comments modules for @somatonic . To enable threaded comments support, edit (or create new) comments field, and set the "reply depth" option to something greater than 0. You'll also want to include the new comments.css and comments.js files in your document, per the instructions on the field configuration screen for your comments field (bottom of details tab). Please note threaded comments are not yet tested in production use and there are likely still issues to work out, but hopefully everything should work for the most part.