Unless the Egyptian government kills all of the phone lines as well, you might remember one means of getting online that broadband has since relegated to obsolescence: dial-up. While there's no Egyptian ISP that will allow internet access to Egyptian citizens, other countries will, meaning any Egyptian citizen with long-distance calling capabilities can break out their old school 56k modem and dial-up an ISP in another country. (Sure it's going to be a slow connection, but you can survive.)
Several ISPs—such as Budget DialUp—offer dial-up numbers all over the globe. Some ISPs in other countries are offering free access to Egyptians specifically in response to the Egyptian government's actions. According to twitter user @ioerror, French ISP FDN is one of them:
Egypt can use this number for dial up: +33172890150 (login 'toto' password 'toto') - thanks to a French ISP (FDN)#egypt #jan25
Others report that even DSL is still a possibility:
@SultanAlQassemi DIAL-UP ISP IS WORKING. DSL still working#Egypt,Try their Dial up numbers (0777 7770),(0777 7000) SPREAD THE WORD #jan25
While dial-up isn't an ideal means of getting online for most of us, it's still a perfectly effective means of connecting when your government shuts down the internet. And until the Egyptian government shuts down all landline access—another huge step up the censorship ladder—there's not much they can do to completely shut down the internet.