Question: why have the forums, u13, and all other stuff you host been going up and down?
Answer: because the backbone network that my servers are on have been having routing problems today. If you look at
http://internetpulse.com and look in the XO row and column, any orange/red/yellow stuff is bad and means the problems haven't yet been fully resolved.
Unfortunately there's nothing I can do but wait. I've contacted my host and they said they're aware of the problem and that they've informed the network provider.