This is the best breakdown we've seen of SOPA and why the proposed law goes too far, especially in targeting U.S. websites, potentially including yours truly:
http://mashable.com/2012/01/17/sopa-dangerous-opinion/
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And now for some music:
This is a pretty decent SOPA protest song, and immensely popular with almost 700,000 views on Youtube since being posted just 2 days ago.