If you are interested in adding ajax comments to your website, I highly recommend using the following three Plugins together. The only time your comment area will force a page reload, is when the first comment is posted for an article, after that the entire comment area is ajax.
WordPress Thread Comments, With Ajax mode enabled – It will create the threaded appreance in the comment area, with great ajax encoding. All I can say about this plugin is to get it, use it and love it. (more…)