For better or worse, and sometimes both, the lens of the media can distort our perception of reality. The events unfolding in Egypt are undoubtedly of historic proportions and Tahrir Square is the epicenter of change. The intensive media coverage focused on Tahrir has made the square seem larger than life and while that may be true in terms of the burgeoning revolution, the square itself is relatively modest in size.
An overlay of Tahrir Square on the site of Superbowl 45, Cowboys Stadium, visually reinforces that the crucible of change does not need to be as expansive as the change it is catalyzing.
Note: The capacity of the Square has been estimated anywhere from 50,000 to 2 million with the reality somewhere in between likely closer to the 87,000 than the 2 million. (http://www.wired.com/dangerroom/2011/02/how-many-people-are-in-tahrir-square-heres-how-to-tell/)