I hope it's OK to copy the email I just got onto here - it's so sad, I thought mumsnetters could help ...
Dear Friends, I have just learned that the Nigerian supreme court has upheld the death sentence for Amina Lawal, who was condemned for the crime of adultery.She is to be buried up to her neck and stoned to death. Her death has been postponed for one month so that she can continue to nurse her baby. Amina's case is being handled by the Spanish branch of Amnesty International, which is attempting to put together enough signatures to make the Nigerian government rescind the death sentence. (A similar campaign saved another Nigerian woman, Safiya, condemned in similar circumstances.) The petition has so far (as of April 7th) amassed over 4,100,000 signatures. It will only take you a few seconds to sign Amnesty's online petition.
Go to the web page amnesty
enter your first name in the space marked 'nombre', last name ('apellidos', county/state ('provincia', and country from the drop down box - choose Reino Unido (UK), Estados Unidos (USA), or whichever is appropriate. Then click on 'Seguir' and go to the second page. There you have the option of entering your email address if you wish to receive follow-up information. In any case, be sure to click on 'aceptar' to have your name added to the petition list.