The classicamiga server was attacked over night with the index files of most sites hosted on there having a eval hash line added to the top of each files. This redirected the sites to USA.cc
I edited and removed the injected code, and it restored some sites, but some of the more complex ones like Joomla it didn't work and I'm going to have to look through them more.
All that I need at the moment.
The Amibay server wasn't affected at that time when that attack happened, but it seems similar from all your reports here. I will look at the site files when I get home from the hospital later and see what had happened.
Luckily I always alter the file structure of vBulletin sites when I set them up so the majority of the sites don't rely on the standard index files for most of it to work, so only the first home page will go down.