Its a DDOS attack from IV Chan. -_-
Notch said its a SYN flood.
We'll just have to wait until they are bored.
EDIT: I just checked all the major /i/ boards. Definitely not them, one of the major ones even hosts their own Minecraft servers. Ugh, can't wait for this to be over. Hopefully it will be done with for my weekend.
Well the guy says he is not from the cesspool, and I have already confirmed he is not with the above boards. Whoever he is, he is a massive dike.
Also, look at the stats on the top left of mc.net, they have changed drastically. I wouldn't login to the site itself until this blows over, just to be safe.