C & D
It’s all about Comments and Discussions. You can find below the links which I found interestingly suitable for comments. They have my views too.
1. http://www.facebook.com/topic.php?uid=29092950651&topic=13658
2. http://www.facebook.com/?ref=home#!/TED?v=app_2373072738 – TED discussions page
3. http://www.thehindu.com/opinion/columns/sainath/article2110433.ece
4. http://www.thehindu.com/opinion/editorial/article1462427.ece