It dawned on me yesterday, and it was confirmed today, that I should have taken the time to define my terms a bit in my post about the Emergent Church and Arianism.
Arianism is a teaching which arose early in the history of the Church which taught, among other things, that Christ was not co-equal with God, but was the first created being. It was quickly opposed by several of the leading theologians in the church at the time and a handful of the early church councils dealt with Arius and his theology. One of the things Arius had going for him was his ability to popularize his teachings. It is said that he would revise lyrics to the songs merchant men and sailors would sing and teach the new songs to them. In turn, they would carry them around the Mediterranean.
When Arianism is discussed with regard to its influence today, it is almost always in the context of Mormonism, Jehovah’s Witness, or some other cult with a similar view of Christ’s humanity.
If you want further information on the subject there is a good, concise entry in the Catholic Encyclopedia.