Another example would be research going on at universities. They hire ph.d's and post-grads with tuition-income to produce research that is available to all.
"Act only according to that maxim by which you can also will that it would become a universal law." - Immanuel Kant
"Beware of he who would deny you access to information, for in his heart he dreams himself your master." - Pravin Lal
This is rather late, but Free Culture by Lawrence Lessig is a very good read on the general subject of intellectual property rights.