Well Lefteris_D already mentioned it. The server admin of
the main site (not me) tried to perform a kernel upgrade,
and that seems to have gone wrong.
Oddly it is taking AGES for the people at the datacenter to
fix the problem -- really weird. They could have rebuild the
entire server (software, hardware) twice by now.
As Lefteris also pointed out, there are mirrors of AnimeSuki
though, such as:
http://animesuki.sandwich.net/
http://www.rpguru.com/
Since I didn't think the site would be down for such a long time,
I didn't change the DNS right away. I've done now though and
of course now I wished I had done so earlier.
Oh well, hopefully the server will be back online sometime later
today (which you can tell if the AnimeSuki Forums are back online,
as there are no mirrors of the forum).