Mirman really gets them going--they accuse MCI of running a child pornography website, and say that they aim to destroy the ACLU, for example.
These calls were all illegal under the Telephone Consumer Protection Act, even though they were initiated by a nonprofit, since these calls were clearly intended to advertise UAT. Prerecorded calls to a residence are illegal.
United American Technologies is based in Oklahoma. The calls came from "Faith, Family, and Freedom," a 527 organization created by Oklahoma Rep. Lance Cargill, who is now Oklahoma's Speaker of the House. There are more details about these calls in Wikipedia's entry on United American Technologies.
(Hat tip: The Two Percent Company.)