I just tried to login to the admin area, but it's not accepting the credentials you sent to me on 7/29. Can you check that those are valid and/or resend new ones?
As for the currently problem, you mention a few things.. "several issues prevented the site from loading" and "Facebook connect button is not going through the entire process of logging into or creating an account". Were all those things related to JFBConnect, or did other extensions have issues when you upgraded?
Also, for the 'not creating an account' bit, were there any error messages or anything else that you can tell us was happening? That will help us narrow things down much quicker.
Thanks,
Alex