I've heard there are issues with regard to copyright (I seem to recall advice to register a pen name with the U.S. Copyright Office,with respect to the more tra

I've heard there are issues with regard to copyright (I seem to recall advice to register a pen name with the U.S. Copyright Office,with respect to the more traditional "ink on bound paper" environment), but I don't know the details. Would any of our more legal minded folks have a comment on this?