In November of last year (see the update) JP Meyer contacted EA Direct about the possibility of Kilrathi Saga and Wing Commander 4 being rereleased again. He was told that while uncertain, it could happen in the next three months. Yesterday he contacted them again, and here's the (disappointing, but not surprising) response he got:
This product has been discontinued and is no longer available. We apologize for the inconvenience.One of the reasons that the games won't be reprinted could be the fact that the current EA Tech Support personnel are no longer familiar with the older games.