If you haven't heard, Egypt's government is trying to quell an internal resistance movement by shutting down all communication avenues in the country, including radio, television and internet. If you think these claims are dubious, see for yourself here.
Just-Ping will let you enter in any domain/URL, and it will check ping times on servers all around the world. If you notice, when it gets to Egypt, it says checkpoint not available. Why's that? No internet there, of course. [Just-Ping via John Herrman]