Update: "It's worth pointing out that a lot of the younger Egyptians regard these parties as irrelevant and are more attracted towards non-party activism or movements like Kifaya ("Enough")."
As I write it is just after 1pm in Cairo and today, Friday, is the "day of departure".
Tahrir (Liberation) Square is very full. The army is searching all who enter the square to try and weed out any armed pro-Mubarak thugs.
Al Jazerra live stream: here
If that stream is too 'choppy', go to Al Jazeera's youtube channel and scroll down that page.
Elsewhere, Guardian live blog for continual updates
To all, stay safe