First of all, thank you for a great plugin.
I do however have one feature request that you might consider implementing in the widget. It's a "Load more" button in the bottom of the widget, which loads additional posts/comment (using ajax) when clicked.
Like this: http://julienrenaux.fr/demo/load-more.php
I hope you will consider it. I think the addition of a "Load more" button would be widely appreciated and make an already great widget even better.