Yes, I was really surprised when Internet access stopped here in Egypt, I couldn't believe it was possible for the government to do such a completely idiotic thing. Apparently they thought that would prevent the protesters from contacting each other so they would quit or something (the protests started from a mere facebook group). This and also the cellular services blockage only made the protesters even more stubborn with their demands.
I really can't describe the week when all these communication services were blocked, but it was terrifying how you can't call anyone using a mobile phone or chat with friends to know whether they were okay or not.