Wow, I had a few very strange days trying to figure out what was going on with this plug-in, which completely disappeared from the WP repository for a while along with all support and guidance. I see that creator Marcel Bokhorst is not associated with it any longer and a new dev team is in place. Good luck, guys!
Thank you for removing ReadyGraph. Yesterday I was forced by the plugin to install it and not long after the plugin prompted me for payment, saying I could only have 100 users associated with my blog without paying them money. I had no intention of paying and didn't know how my blog would be affected by this. That was an uncomfortable feeling.
Today I was asking myself what I needed to do to get rid of ReadyGraph and find an ALTFB alternative, and when I checked, I was delighted to find that it's back up and running.
I really like this plugin. It does a great job and integrates superbly with Facebook.