Andrew Orlowski has written a very good summary of the discussion sofar with a look to the future:
"The deeper battle is a the historic one, about how much social and corporate responsibility new internet companies are obliged to take on board. The DMCA legislation of October 1998, correctly, let them off the hook for anything. This was done in the hope that new markets would be created without the constraints imposed by backward-looking copyright industries.
But now, after 15 years, things seem quite curious. It's the web giants that are backward-looking, and who fight hardest against the creation of markets. (They'd much prefer to be personal data miners, rather than allow free commerce to flourish.) Silicon Valley has done very well wrapping angle brackets and pastel colour graphics around 30-year-old internet protocols and calling them innovation. IRC becomes Twitter, for example. As former vulture Ashlee Vance writes here (a must-read), Valley's Web innovation may not leave very much for our grandchildren - and is acquiring all the vanity of Hollywood."
www.theregister.co.uk/2012/01/17/beyond_sopa/