bruce-church (http://bruce-church.myopenid.com/) has left a new comment on your post "What Changed?":
Yes, but those are the professors who around 1961 said there is no special office of the ministry, but just ministry, period. So the ushers are involved in the ministry. What that can lead to is an anything goes mentality, such as in the Methodist Church they have "893 fresh expressions of church," like "Messy Church":
New figures reveal changing shape of Methodist Church
http://www.christiantoday.com/article/new.figures.reveal.changing.shape.of.methodist.church/26773.htm
excerpt: The report identified 893 fresh expressions of church, with café churches, Messy Church and cell groups being among the most popular.
