CNN has posted a follow-up article entitled "U.S. Networks Reject Gay Church Ad."
For the record, I've been told (by a UCC clergy-member), that they will show the UCC's other ad, which will show after new years. The other hand features children of a variety of races singing the "this is the church, this is the steeple, open the doors, and see all the people" (accompanied by weaving fingers together inward, putting up a pinkie steeple, opening up the thumbs, then turning hands up to wiggle "people" fingers). It also carries the same message.
More information about the commercials can be found at Still Speaking, one of the UCC's websites.
(thanks to Jimmy at Window Pain for the tip)