They've been offline for awhile -- certainly all weekend. Seems to happen to all of the sites now and then. Last month people were angry about not being able to logon to Carib, and before that it was Pinnacle or Olympic. Best thing is to have at least 3 books, to have a better option to getting the best possible line, and so that if one of them goes offline, you got everything you need with the other two.
If I were to have 4 different books, I'd take the four mentioned above.