"Copyright notice was required under the 1976 Copyright Act. This requirement was eliminated when the United States adhered to the Berne Convention, effective March 1, 1989." (First Hit on Google, 2009, p.1)
The copyright notice is unnecessary, but the grandparent is absolutely correct on how it works. The year is date of first publication. See http://www.copyright.gov/circs/circ03.pdf.
"Copyright notice was required under the 1976 Copyright Act. This requirement was eliminated when the United States adhered to the Berne Convention, effective March 1, 1989." (First Hit on Google, 2009, p.1)