Request on web censorship

The website of the Muslim Brotherhood, www.ikhwanonline.net, seems to have been blocked by the Egyptian authorities. (I have asked a friend in London and it works fine there, but it also seems blocked in the UAE.)

Does anyone reading this know how frequently Egypt blocks access to websites? To my knowledge, very few sites get blocked (the Brotherhood site was blocked last year, but only for a month or so). Is that correct? I'd appreciate any feedback by informed people.