The Egyptian Association for Change is one possibility but I have no way of knowing if they supplied the sign. Here is their website, which shows their protest schedule, with links to their Facebook pages. http://eacusa.org/
Thanks. Good possibility. From your link:
4- What is your relationship to the National Association for change-Egypt?
Like many Egyptians, we support the NAC’s call for change and adopt the 7 points it has presented for reform. We don’t report to the NAC, but our members are in constant communication with the members of NAC to coordinate and synchronize our positions in the face of the challenges we meet.
5- Are you financially supporting the National Association for Change?
No!
6- Do you belong to or support any political parties?
No!
The Egyptian Association for Change is a non-partisan, non-sectarian and non-ethnic organization. Any Egyptian that adopts the Association’s call for change has the right to become a member.
7- Are you supported by the American government?
No!
The association was formed by a group of Egyptians and Egyptian Americans living in the USA. The American government is not in any way involved with our group. Any member’s relationship with the American government or any foreign government is strictly done outside of the mandate of the Association and doesn’t represent its official position.
8- Are you going to lobby the American government to press for change in Egypt?
No!
9- What is the structure of the Association?
The Association’s main chapter is in Washington DC. As of today, we have other chapters in NY/NJ, Massachusetts, North Carolina, California and Michigan. All the chapters work together to ensure their activities and positions are well coordinated.
http://eacusa.org/faq.html
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Elbaradei forms the “National Association for Change”
Posted on February 24, 2010 by Mohamed| 2 Comments
Hours ago, former IAEA chief Mohamed ElBaradei has announced the formation of the “National Association for Change” with aim of ” constitutional and political reform to achieve social justice and democracy “.
Many notable Egyptian politicians and activists attended the meeting at Elbaradei’s house today. Among them was Ayman Nour ElGhad Party leader who previously invited Elbaradei to form a consitutional convention.
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Expectations are high for a strong coalition to bring change in Egypt.
Other attendants included Muslims Brotherhood parliamentary group leader Saad El-Katatny....
In recent months, an independent popular campaign was launched online to support Elbaradei as a presidential candidate in 2011. After intense reaction from the opposition newspapers, the campaign gained strong ground among Egypt’s younger generation.
Currently the Facebook group for the campaign has reached more than 100,000 members, with a 10 thousand member increase in one day after Elbaradei had a live tv appearance discussing his presidential bid.