The announcement was made to Kenrick-Glennon students and faculty today at noon.
From the IPF site:
The Most Rev. Robert J. Carlson, Archbishop of St. Louis, announced today that Father John Horn, S.J., has been selected as the rector-president of Kenrick-Glennon Seminary, the seminary of the Archdiocese of St. Louis. Father Horn, a member of the Maryland Province of the Society of Jesus, and a co-founder and Director of Program Development for the Institute for Priestly Formation, Omaha, will begin his duties as rector on July 1, 2011.