You can still sign the petition, because all comments get emailed to HRW and Amnesty. There are over 1100 signatures and 250 comments, including from places like Jordan, Lebanon and Morocco!
The Call to Action and supporting materials can be seen in this document:
Egyptian website Rassd reported on the Zionist Organization of America's condemnation of the series and their call for President Obama to pressure Egypt's president to have it stopped.
(Special thanks to Dian for delivering the petitions and working so hard on this material. All during her vacation in New York!)