Al Gore has come out strongly against SOPA and PIPA, angrily denouncing the bill and its supporters. It's a quick 2-minute video taken at a CareerBuilder event (which has been removed by the poster), and it's in response to an audience question. The actual question isn't heard in the video, but he's clearly talking about SOPA/PIPA and appears to be well-informed on the issue: 

Former US Vice President Al Gore

A quick transcript (the very beginning is cut off, so it comes in mid-sentence):

"... are now able to be shared digitally. There is a growing concern on the part of the companies and individuals who create that content, that they're not getting compensated in a fair way, and so they want to impose a new set of requirements on those companies who provide access to the internet, like the browsers, the search engines, etc. And some of these new requirements, according to the experts on the internet, would very probably have the effect of really shutting down the vibrancy of the internet. As in all things, some compromise must be possible. The content creators and owners have a point and a legitimate complaint... But, in our country, in our world today, there is hardly anything more important -- whether you want to solve global warming, as I do, whether you want to reinvigorate democracy as many of us do, whatever problem you want to fix -- there is hardly anything more important to getting the right things done than to save and protect the vibrancy and freedom of the internet. The internet is bringing life back to democracy. We saw it in Egypt. We're seeing it in Russia now. We've seen it in so many places.... If you look at the reform movements around the world, and in the US, more than likely they're based on internet forms of organization. And anything that would threaten the vibrancy and freedom of the internet, I'm against!"

There's very loud applause at the end. If you watch it, you see he gets more and more animated and worked up towards the end. He's also clearly familiar with the details, since he knows the real impact of the bill. Rather than just focusing on "foreign" sites, as supporters of these bills would like everyone to, he points out that the way in which this is done is to put new requirements on tons of domestic internet companies. He may not have invented the internet (and yes, I know that was taken out of context, but it's a meme at this point, so live with it), but he certainly understands its importance... and he's clearly not a fan of SOPA/PIPA.

Bio

Former Vice President Al Gore is co-founder and chairman of Generation Investment Management, a partnership that is focused on a new approach to sustainable investing. He is also co-founder and chairman of Current TV, an Emmy Award-winning, independent cable and satellite television news and information network based on viewer-created content and citizen journalism. In addition, Gore is a senior partner with the venture capital firm Kleiner Perkins Caufield & Byers, a member of the board of directors of Apple and senior adviser to Google.

Gore spends the majority of his time as chairman of The Climate Reality Project, a non-profit focused on solutions to the climate crisis.

Gore was elected to the U.S. House of Representatives in 1976, 1978, 1980 and 1982 and the U.S. Senate in 1984 and 1990. He was inaugurated as the forty-fifth Vice President of the United States on January 20, 1993, and served eight years. During the Administration, Gore was a central member of President Clinton's economic team. He served as President of the Senate, a Cabinet member, a member of the National Security Council and as the leader of a wide range of Administration initiatives.

He is the author of the bestsellers Earth in the Balance, An Inconvenient Truth, The Assault on Reason, and Our Choice: A Plan to Solve the Climate Crisis. He is the subject of an Oscar-winning documentary and is the co-recipient, with the Intergovernmental Panel on Climate Change, of the 2007 Nobel Peace Prize for "informing the world of the dangers posed by climate change."