I have finally found it on a schedule. On the UHD channel (that is Universal HD) it is playing on a regular basis. Monday through Friday at 4:00PM Central and again at 1:00AM Central. TimeWarner digital cable carries UHD, I don’t know what other providers carry the station.
I think this is the reason the show has so much resonance with Dopers. Most people I interact with don’t get the most obvious references to the show, and only vaguely remember the show being on. It has an intellectual depth to it that the average joe doesn’t comprehend.
I have seasons 2 and 3. I avoided season 1 because it was so short. The DVD is overpriced. But I will eventually get it, just to have the complete series.
Since this thread started, I have gotten the show from Netflix. It is definitely true that it has aged very little and it is as good or better than I remember.