here, here, and here. Photo above from the last link.
I doubt that this is going to be treated as that big a deal by all but the most radical among the revolutionaries, because most had already decided to leave during Ramadan, and shopkeepers on the square have been frustrated at the continuing sit-in. On the other hand, up to now the Army has declined to move against non-violent protests. Certainly compared to what has been happening in Syria, this is not that heavy-handed, and clearly many Egyptians were becoming frustrated with the diehards. So far as I can tell, no deaths have been reported; there were many injuries and arrests, however.
An Added Note: I'm seeing some complaints that the troops are "having a picnic" in the square, as if rubbing it in. But the soldiers have been fasting all day too, so it doesn't surprise me that they are breaking their fast (it's past iftar in Cairo now) at their posts.