Lawrence Lessig, Stanford University law professor and chairman of Creative Commons, speaks at the World Social Forum in Porto Alegre, Brazil, Jan. 29, 2005. The eclectic gathering of pacifists, environmentalists, libertarians, trade unionists and anti-establishment militants was timed to coincide with its nemesis, the World Economic Forum held thousands of kilometers (miles) away in the swank Swiss mountain resort of Davos. Creative Commons is a nonprofit organization devoted to sharing creative material online. (Douglas Engle/Australfoto)

Lawrence Lessig, Stanford University law professor and chairman of Creative Commons, speaks at the World Social Forum in Porto Alegre, Brazil, Jan. 29, 2005. The eclectic gathering of pacifists, environmentalists, libertarians, trade unionists and anti-establishment militants was timed to coincide with its nemesis, the World Economic Forum held thousands of kilometers (miles) away in the swank Swiss mountain resort of Davos. Creative Commons is a nonprofit organization devoted to sharing creative material online. (Douglas Engle/Australfoto)