Here is a great article for people unfamiliar with the Digital Millennium Copyright Act(DMCA) and why it is such contentious law. It briefly explains why it is fair use to copy a VHS tape (the famous Betamax case) but not a DVD according to current legal precedent. The article cites some recent copyright controversies including the 321 Studios and ClearPlay cases and notes that some in Congress are attempting to be remedy this fair use issue through the proposed Digital Media Consumers' Rights Act (DMCRA).
Article via Yahoo! News.