Good, this extension working well!
Posting as guest or member! But ajax not using for login popup!
Also, comment form is very hight! i think you should cuting hight to display other (exam: other article bottom)
This is good plugin to remove copyright, so it not work with template cache, firt page (no cache, it work, but the second page created is show copyright too)
This plugin is 1.5 only, no 1.6 version!
But i want to give 5 star for good plugin! ^^