Francis Beckwith, Baylor University professor of church-state relations, has returned to the Roman Catholic Church. He recently has been restored to full communion, and his wife has been accepted as a catechumen. He gives his reasons and explains the timing of his announcement on his blog, linked above. James White has an interesting commentary on the announcement.
These are certainly curious days when the President of the Evangelical Theological Society resigns his position in order to return to full communion with the RCC.