I've been using this for a while, and the last couple of months, the plugin has failed me...
The social publisher function is the one i need the most, and it doesn't work!
In the latest version i can't even see it when i go to the plugin settings, the "Social Publisher" is simple not there!
And when i has it set up, it would not post to my facebook application. i was lucky to get it to do it once when i redid all the settings in the plugin, but after that it failed again.
Another thing that could be very useful, is the ability to get notified when a user has commented on a post on wordpress, it could be done via email or even facebook notifications.