The Internet shut down in Egypt
The government of Egypt has now not only shut down the social networking websites, they have shut down the Internet.
http://www.zdnet.com/blog/networking/the-internet-goes-dark-in-egypt/613?tag=nl.e539
The Egyptian government is obviously wants to restrict communications between the leaders of the unrest in the country and prevent any news or information from getting out of the country. That way the official government story is the only story that gets out to the rest of the world. Restricting communications among the dissidents is a way to help suppress the unrest and potential revolution.
I’m not sure who is behind the demonstrations. Some say it is Muslim extremists who want Egypt to become a Islamic Republic, some say it is people who want a true democracy in Egypt. Either way, the government is doing everything it can to suppress the rioters ability to communicate.
This is the same power that your President wants here in America. I’m guessing for exactly the same reason.