We learned today that Moin would run as a candidate. Contrary to what he said before in protest against the Guardian Council.
He has released a "statement":http://www.emrouz.info/ShowItem.aspx?ID=2598&p=1
saying he still believes that the Guardian Council had violated the law and only public opinion had convinced him to stand in the presidential election!
There are only 19 days left to the election and official campaigning has begun and local media will begin airing the campaign advertisements starting tomorrow.
There were rumors that Karoubi may withdraw so the reformist camp would unite under one candidate, but today "Karoubi denied":http://web.peykeiran.com/net_iran/irannewstitles.aspx such rumors by saying he believes that the reformists will not be able to reach a consensus, and he would not withdraw for the sake of any other candidate.