Yeah, in all honesty, your the 2nd user to mention their extension, and the other time was simply for the VM integration.. which didn't seem clear at that time too. We know about all the extensions that are frequently mentioned, that just isn't high on our radar yet.
As for this site, you actually should have received a "You just created an account on sourcecoast" email. I can check and see what not. As for the way we have this site setup, we're using the automatic registration mode of JFBConnect so that your Joomla account is created for you automatically. Right now, you don't have a Joomla password for your fb_101322065 username. If you hit "Forgot Password" though, you can create one. In this mode, the primary way to log in is through Facebook... which we also have an option to automatically login Facebook users (if they're logged into FB in another tab), but that's disabled right now because when users log out here, we don't want to log them out of Facebook (there's an option for that too!)
The other user creation option we have is to let the user select their own username and password, which then, on return, they can login through Facebook or through Joomla. It's all configurable through JFBConnect and all very easy.
Hope this answers your questions, but if not, you know where to find us!