How To Add Recent Comments To Your Side Bar

Go to the LAYOUT of your blog. Click ADD A GADGET.

Now scroll down until you get to Feed. Click the plus to add it.

Where it says Feed copy this text into it.

http://YOURBLOG.blogspot.com/feeds/comments/default

But where it says YOURBLOG type in the individual address of your blog. For example I would type 

http://guidelinks.blogspot.com/feeds/comments/default

You can then decide how many comments you want to be shown, whether you wnt to time stamp them or whatever.

Save the widget and you can drag it down the sidebar if you don't want to have it at the top.