When following the chatter about the Egyptian revolution, every now and again someone goes "but what about the Muslim Brotherhood?" This is hardly surprising, as the specter of Islamic radicalism was the main justification the American—and, to perhaps a slightly lesser degree, European—governments presented for supporting such a nasty character as Hosni Mubarak. What's more, Egypt was the cradle of modern political Islam, and the biggest such organization—the Muslim Brotherhood—is rather big in Egypt. It is probably the biggest single organized opposition party there at this time, in fact. Political Islam is a reality, and should there be genuine political pluralism in Egypt, it will be very much a player there.
That doesn't mean that men will have to grow beards, women will be forced to wear "burkhas"1, and everybody will grab a rifle and start a jihad against Jews, Christians, and Americans.