No, the comment posting module isn’t quite ready yet, but there is one nice shiny new Ajax-driven feature today. When you click the “new comments” button at the bottom of any comment thread, in addition to showing you any new comments it will also update the main entry at the top of the page (i.e. my verbiage) automatically, to let you keep up with any updates or changes in the main topic post without having to reload the entire page.

Important: to make sure you’re using the latest versions of all the modules, please use your browser’s ‘Reload’ button at least once; that should flush out the caches and get all that nice new Javascript in place.