I have now forked and updated it to match the code in the current latest version of Genesis, 2.3.1.
How to download the plugin?
Head on over to this gist and download/save/create both the needed php files. Place them in a directory named custom-featured-post-widget in wp-content/plugins. Go to the list of plugins in dashboard and activate the plugin.
What does the plugin do?
When you activate the plugin there isn’t going to be anything different. Use this functionality plugin when you want to customize the output of Genesis Featured Posts widget(s). The file to modify is class-custom-featured-post.php.
Here’s the diff between the original Gary’s plugin and the updated one. Also note that this new update does not relocate the titles like the old one did. So it really is like a blank canvas to make changes to Genesis Featured Posts widget.