To add a “Recent Comments” in your blogger.com / blogspot powered blog is easy. Follow this simple tutorial on how to install it:
1. After login, click “Layout” -> Add Gadget -> Feed;
2. Fill the blank box with your blog comment feed. The comments feed structure is of two kinds as follows (pick one):
(a) Atom 1.0: i.e. http://blogname.blogspot.com/feeds/comments/default.
Example: http://googleadsense-tour.blogspot.com/feeds/comments/default
(b) RSS 2.0: i.e. http://blogname.blogspot.com/feeds/comments/default?alt=rss
Example: http://googleadsense-tour.blogspot.com/feeds/comments/default?alt=rss
3. Click “Continue”
4. In the “Title” write “Recent Comments”
5. Click “Save”. Done.