Is death an appropriate punishment for adultery?

I am sat here pondering what the world has turned into as we sit by and watch a human being's life taken as punishment for committing adultery. A yahoo based article today elaborated on this case: (http://uk.news.yahoo.com/5/20101103/twl-iran-stoning-woman-to-be-hanged-toda-3fd0ae9.html). An Iranian woman;Miss Ashtiani is to be executed in Tehran, by hanging for committing adultery. As expected the UK has taken a stance on the matter with the foreign office minister, Mr Alistair Burt reminding the Iranian diplomat in London that the execution is "unacceptable". Even religous and political figures worldwide have condemned the practice. However, will this be enough to stop her execution or will the outcry fall on deaf ears? One thing is for sure though, it is very sad to know that no matter how far we have come from barbaric to civilisation, there are still those out there that are not willing to move forward. I sincerely hope that the Iranian authorities see sense and withdraw the decision to execute Miss Ashtiani.