I just read a neat little book that Dan Pink recommended in his blog called Bound By Law. It gives a great overview of Public Domain and Fair Use laws and is presented in comic book form. It is a great resource for e-learning developers looking to use media elements in their courses to make them more engaging. The book discusses the balance between protecting an artists work while "ensuring the availability of raw materials for future creation," what type of work is usable, and how the Copyright law may be going astray.