Can't remember who or exactly what was asked, but someone was very interested in the effects of digital publication on their copyright. There's a new book just out (sorry if this counts as advertising), which looks to cover most of the subject area (US at least):
"Digital Copyright" - Jessica Litman, professor of law
at Wayne State University and a widely recognized expert on copyright law.
The book is published by Prometheus Books (800-421-0351), 225 pages, costs $25, ISBN 1-57392-889-5, email books6205@aol.com.