I am unable to log into the Judge Center, for reasons unknown to me. Is it possible to send reviews to someone else, to enter them in my name? Reviews should be entered ASAP, especially advancement reviews.

Did you migrate your account to the new Wizards account system? If so, that could be related to your login issues. I'd review Andy Heckt's post about that. If that's not the issue, or you can't resolve it quickly, I'd recommend contacting your Regional Coordinator, Johanna Virtanen.

That is indeed the issue, and after contacting customer service repeatedly and trying different things it has still not been resolved. They just keep answering me with automated messages that don't provide a solution for my problem. Since it doesn't look like I will be able to log in for a good while, I need a solution as far as entering reviews go.

Have a look on this topic http://apps.magicjudges.org/forum/topic/13882/.