For once, this is actually a quality OEM product. We do know who manufactures it - it is essentially a Conoco Hydroclear oil. It is very easy to find, as it is carried at every Wal-Mart I've been too. Its also reasonably priced, generally about 1.39 for all grades except 5w20, which is about 1.79 a quart. My local dealer also carries it for about the same prices.
I think you don't hear as much about it because many people figure just like one of the previous posts that its overpriced dealer hype on the oil. People see "motorcraft" on it, and get the same reaction.
Also, some people on this board dislike the lack of moly in these oils, but that hasn't been an issue in any of the UOA's we've seen of this oil either.