If you haven't heard of this story, now is a good time to read it. The retrial starts in 7 days, and there are currently 209,725 signatures on the petition. Maybe the viral marketing effect of blogs can help to give that number a boost.
On January 3, 2006, 18-year-old Nazanin Mahabad Fatehi was sentenced to death for murder by court in Iran after she stabbed one of three men who attempted to rape her and her 16-year-old niece in a park in Karaj (a suburb of Tehran) in March 2005. She was seventeen at the time. Iran is signatory to international treaties which forbid them to execute any one under the age of 18; however they continue to do so.
Learn more about the case and sign the petition here.