Comment on websites that don't allow comments

There are quite a few big websites out there that post information / opinions but don't have any method for the reader to provide feedback.
There is now a platform for feeding back which allows you to comment on items on these websites.
The following websites are currently supported
www.theregister.co.uk
www.boingboing.net
postsecret.blogspot.com
www.gizmodo.com

The comment site can be found at:
http://www.floodle.net/comments/