Link Luv is a module for ExpressionEngine that’s similar to Comment Luv for WordPress. When a visitor to your site leaves a comment on your blog, it will display a link to the most recent entry from their RSS feed (if one is found).

Instructions and more information can be found here:

http://www.crucialwebhost.com/blog/link-luv-module-for-expressionengine/

And you can download the latest version of KeyAds here:

http://ee.cwhapps.com/modules/linkluv/latest.zip

NOTE: Right now, cURL is required for this to work. The next version will use fopen if cURL is not available.