UPDATE II: Several activists and two of the senior Brotherhood figures have been arrested in the small hours of the morning apparently. Tomorrow is going to be serious business, I fear.
UDPATE: If this story is true, it could be a bad augury for tomorrow. Why would security forces burn cars unless they're acting as provocateurs to justify a hard crackdown?
Egyptian bloggers and tweeters have been reporting major problems accessing the Internet altogether — not just Twitter and Facebook, which have reportedly been sporadically down for the last couple of days. Yesterday Suez was cut off — mobile service, landlines, SMS, even in some neighborhoods electrical power. If they shut down all Internet access, the outside world is going to have problems reporting tomorrow's demonstration. Many foreign media have already been arrested but later released.
It worked in Iran in 2009. Can it work in Egypt? It's generally even more connected, but we'll see. (Shades of when I first lived in Egypt in 1972, when the phone system was undependable and getting a phone line took years, as opposed to now, when everyone's mobile.)