Here are some useful links if you want to find out more about copyright...
Wikipedia on Copyright
This is a clear and general definition of Copyright Law.
UK Copyright Myths
An interesting UK resource highlighting Copyright Myths. You may be surprised!
Statute of Anne
The first ‘copyright’ law protecting creators and enabling them to earn a living from their creations.
Rip! A REMIX MANIFESTO
This video provides a provocative insight into copyright issues in our modern, digital, global world. Well worth the 90 minute viewing.