Great idea for a plugin, thank you! There is not really a working alternative for WP. Unfortunately this one is a little bit buggy and not very well maintained.
Warning: Missing argument 5 for Social::get_avatar() in /customers/xxx/xxx/httpd.www/wp-content/plugins/social/social.php on line 1702
Deleting references to this fifth argument for get_avatar() in social.php solves the problem, but results in images without an alt-tag. It's a workaround, not a solution.
Pagination for comments missing
Maybe I didn't see it, but is there any pagination for comments at all?
Connection with Facebook pages
The developers already promised looking into it a few times on this forum. But more than a year without an update? Please Alex! At least give us an estimated timeline when to expect the next release.