I've actually noticed more and more people staying on after 8pm. So there's usually a few people around until about 9-10pm EST. There's usually a few people on in the early EST afternoon, also.

"You need me. You wouldn't be much of a hero without a villain. And you do love being the hero, don't you. The cheering children, the swooning women, you love it so much, it's made you my most reliable accomplice." -- Lex Luthor to Superman, Question Authority, Justice League Unlimited