This revolution is all for show. The Egyptian military is the alpha dog in that country. It's well financed, well equipped, with an outstanding intelligence network. Every President of Egypt is former military. Sadat was assassinated by elements within the Army. Mubarak is former Air Force. His new VP is former Army.
All of what you see...the riots, the attacks on western press, etc. is all casus belli of the big bad military crackdown soon coming. As long as the military runs the country, groups like the Brotherhood will be lucky to remain a relevant political organization and not to end up dead, in prison, or on the run.
This revolution could be put down in ten minutes. It soon will. Just have to build enough cover story for the coming brutality.