Well, I can't give you a straight answer because the legalities vary from country to country. Here are some links that you may find helpful:
USA: http://www.copyright.gov/ http://news.com.com/2100-1027_3-998363.html http://grep.law.harvard.edu/article.pl?sid=04/04/01/0411227&mode=thread UK or Europe: http://www.pcw.co.uk/news/1151673
