If you click on this photograph, you'll get a bigger size. It will also reveal why it's difficult to suppress information, even if Egypt has "disconnected the Internet." Note the number of cellphone cameras.
(Photo by Peter Macdiarmid/Getty Images)
Imagine getting reporting like this in the 70's. It's hard not to ascribe this rebellion to the ubiquity of information via Facebook & Twitter.
All of a sudden, we're living in the future.
Here is an article on Digital Trends that mentions Egyptians going "old school" to get their messages out. The cell phone cameras aren't much good if the towers are turned off. (And it sounds like that is the case.) The article mentions fax machines, ham radio and dial-up modems. The article doesn't say much, but I'd be curious if any of the Hams are using packet radio to create links to the outside.
One thing the article does mention is that one ISP, the one that services the Egyptian Stock Exchange, is still operating. So there is some bandwidth available.