At about 7:00 CST this morning, I could not get the English edition of Al-Jazeera. The progress bar would only go partway and the pages loaded indicator said "Contacting http://english.aljazeera.net" and nothing more. If I did nothing, my browser said it was unable to contact the site.
I did find aljazeera.com, a magazine, but it didn't have he details of aljazeera.net.
Finally at about 8:30 I was able to get aljazeera.net.
My guess is that many people on the East Coast were online before going to work or just as they got to their offices.
Today's blog offered hope that the thugs had been pushed back, then it mentions that the army had left one bridge, and finally that thugs crashed through a group of supporters.