I personally had no trouble logging in last night, but a couple I usually play with from my guild had a problem logging on. They have 2 accounts and the newer computer logged on np after the patch but they never did get the older computer to log in after about 20 mins of trying.
Later, I went LD in POV and when i tried to log back on, it said the server was down. I logged on this morning for a short time to check on character and had np.
We have 2 accounts and I logged both on last night, other than the older one being slower as usual, I didnt have any problems with either.