Other
Copyright Central
The Copyright Clearance Center, Inc. provides many links to information on copyright laws. Explains what they are, who needs them, what they protect, and what a copyright violation would be.
Other
U.s. Copyright Office: Copyright Law of the u.s.a.
This site, presented by the Library of Congress and the U.S. Copyright Office, contains links to the text of the U.S. Copyright Law, updated to April 2000. The information is very in-depth on the subject.