"Copyright law is insanely complicated, everywhere. And the law that
US law thinks applies is the place where the activity occurs. So if I
download in the US work protected by US law but in the public domain
in the country where the server is, the download is still a
violation."

Lawrence Lessig on Copyright
http://blog.outer-court.com/archive/2006-04-03-n67.html

http://creativecommons.org/licenses/by/2.5/