There are a great number of organizations that use the terms "Exodus" and "Ministry" or "Ministries" in their name. I still can't unequivocally figure out which one Ms. Meirs was a board member of.
The Exodus Ministries I am referencing is based in Dallas - it fits the name exactly as President Bush said it and it's in Miers' home area. I think it's the one. A Christian ministry helping released prisoners get back into society.