I’ve implemented a comments preview hack to WP. I’ll work it out to look better later. This forces every commenter to preview their comment before it can be posted. But the nice thing is, you can keep on fixing your post and previewing it on the wp-comments-review.php page, as many times as need be, before the final posting. That can be useful. This is a partial anti-spam technique, but also meant to make comments better for all *good* users. So with that in mind, I will be trying to get it all looking better, and having the info on that page that will help code, and perhaps get some clickable smilies installed.
Let me know how it works for y’all!