Tecknojock
Keeping the world running
Fixed after the first hour and half or so, so only really annoying for the people who woke up in the middle of the night to play.
Act 1 is free to play for anyone with a battle.net account.
More than just the first hour and a half, they took those servers down quite a few times yesterday, it was irritating. After what I believe was the final downage at four, the servers didn't have any problems that I noticed.
I've played through the first act twice (Once alone and once w/ my brother) and have enjoyed it so far.