The blackout is well under way, and it is already kind of creepy (I never realized how much I use Wikipedia). Also there's more analysis out there. So a quick roundup you may like:
The brilliant author of XKCD has a simple way to show SOPA awareness and blackout.
MUST READ: A film editor looks at how insanely terrible SOPA and PIPA are. Some great stuff, clear analysis, and historical context – especially on how existing laws are abused already.
You called your congresspersons? If you live in non-US Country are you bugging your US friends? Signed petitions?
It goes without saying that SOPA/PIPA could be the end of a lot of geek/fan culture as we know it. If you think these bills won't be abused by people seeking to maximize profits and quash competition and political rivals, then you probably figure banks would never turn home loans into investments and crash the world economy.
But I know you're smarter than that.