Andree Seu just wrote a very brief article in "World" magazine sharing that she now wears a headcovering in worship. http://www.worldmag.com/articles/13011

The number of hat and scarf-wearers in my church has recently doubled (there are now 10 of us).  I know there are denominations in Scotland where all of the women cover their heads in worship.  Occasionally we meet women in other Presbyterian churches who wear head coverings.  I wonder if this practice is growing in other denominations as well.

"For man is not from woman, but woman from man.  Nor was man created for the woman, but woman for the man.  For this reason the woman ought to have a symbol of authority on her head, because of the angels."  1 Corinthians 11:8-10

Paul's reasoning for the command is based on the order of creation.  This is the same reason Paul uses to argue that women are not to teach men in the church.  Many modern commentators do not believe that an argument from creation has a universal application but at least they are consistent in both doing away with headcoverings and allowing women to teach.   To hold to one and not the other is terribly inconsistent.