Comment any website on the website itself.

You can comment any website on the website itself with zpeech.com!
Just add "zpeech.com/" in front of any URL (zpeech.com/google.com). The website will then open with an additional discussionboard popup - the zpeechboard - on the left hand side, in which you can

* instantly read all discussions ever of users regarding that very website
* add your comments to the website after a short + free registration