From this Russia Today video, starting around 2:15, interviewing a Muslim Brotherhood member:
Mohammed El Baltagy: "We didn't choose El Baradei. We chose him only for a short period of change. He's only temporary."
Notice how el-Baltagy phrases it, as if the Muslim Brotherhood is calling the shots of the current uprising and using players as pawns to gain leadership.
El Baltagy is a major figure in the Muslim Brotherhood.
Much of the rest of the video is about Egyptian skepticism over El Baradei, making some would-be analysts look like complete fools.