I'm happy to say, entirely due to someone who devoted their time and hard work to fixing it, the Animexpansion forum and galleries (and this all the artwork) are back up and running. Some MIGHT still run into the log-in issues.
If you log in and it gives you an error, click on the "log-in" link mentioned in the error text itself to log in. More often than not this swhould allow you to correctly log in.
The site in it's current form should be temporary; This is how it will be to get by until the major overhaul I'm hoping for will be put into place, which will make the site a lot better.