For what it's worth, I can't access it either.
I know that a large server bank lost power and crashed completely yesterday (Internap, the one that host LiveJournal). It's possible that FIRST uses the same company...or it's possible that I'm just trying to rationalize this with a completely unrelated event.
That would be my best guess as to what's going on, but FIRST will probably clear it up once the site is running again.