The rights to the “I Have a Dream” speech are owned by EMI. They are only legally available through buying a $20 DVD.
What would King have made of all this, and of SOPA? I think he might have reframed the question, with poetry: how does ownership of ideas effect how we exist together in the world? How does the spread of ideas help push forward better understanding among men. What price are we willing to pay to keep ideas free? How do we decide who deserves access to ideas, who gets to build on them, and who gets to “own” them? Who gets to censor them, and at what cost?
See also: On the Media’s MLK segment