Techsquad,

You should really be a member of the Yahoo Crestron group.  This topic has come up a fair amount, and there are a bunch of ways to get it done.  The Holovision/Axis solution is very popular, but gets pretty pricy.  I'm currently ironing the kinks out of a Mobotix solution that should be pretty slick once its done.  Mobotix has a doorstation and gate interface that should do exactly what you are looking for as long as you don't need to throw the image up onto the TVs.