This is a year later, but I live north of Sioux Falls and just heard of another VOOMER south of Sioux Falls in Iowa. I had VOOM installed 2 weeks ago--Feb 2005.
Do you still have VOOM? Who was your installer? Any others that have VOOM in this area? Don't see many on the forum.
My experience decades ago, in the New York Airport--standing in line with some Olympic athletes who helped with my luggage and asked where I was from--I said South Dakota--their question: