On Google main page today:

Tell Congress: Please don't censor the web!

Links to
https://www.google.com/landing/takeaction/

watch beyond the break season 1
41
noropook8 55

please dont censor the webb.... ill do what ever u want

Please dont censor the webb.

http://googleblog.blogspot.com/2012/01/dont-censor-web.html

PLEASE DON'T CENSOR THE WEB!
   Some people depend on for their Businesses.
   It will be like shutting down the world. And that
   just isn't 'RIGHT'.

http://9.mshcdn.com/wp-content/uploads/2012/01/google-275x171.jpg

   I think that it is illegal and UNCONSTITUTIONAL.

2012-1-18

Google:
"Tell Congress: Please don't censor the web!"
http://www.google.com/landing/takeaction/
http://www.google.com/logos/2012/sopa12_hp.png

EFF:
http://www.eff.org/deeplinks/2012/01/january-18-internet-wide-protests-against-blacklist-legislation
http://blacklists.eff.org/
http://www.eff.org/sites/default/files/features/protest.png
http://www.eff.org/sites/default/files/features/blacklist-645.png

Mozilla:
http://blog.mozilla.com/blog/2012/01/17/mozilla-to-join-tomorrows-virtual-protests-of-pipasopa/
http://www.mozilla.org/

FSF:
http://www.fsf.org/
The FSF logo has been changed to a gnu with a "stop censorship" mask in front of its eyes. The below image is via the standard url rather than a permalink.
http://www.fsf.org/gnu.png

Wikipedia: http://en.wikipedia.org/wiki/Wikipedia:SOPA_initiative/Learn_more

Reddit: http://blog.reddit.com/2012/01/technical-examination-of-sopa-and.html

Imgur: http://imgur.com/blog/2012/01/16/imgur-joins-blackout/
_________

slashdot coverage (but not participating):
http://yro.slashdot.org/story/12/01/18/0834219/ask-slashdot-what-can-you-do-about-sopa-and-pipa

"You may have heard the House has shelved SOPA, and that President Obama has pledged not to pass it as-is, but the MPAA and SOPA-sponsor Lamar Smith (R-TX) are trying to brush off the protests as a stunt, and Smith has announced markup for the bill will resume in February. Meanwhile, PIPA is still present in the Senate, and it remains a threat."

allthingssd.com has a list of sites and how they are participating.
http://allthingsd.com/20120117/list-of-sites-planning-sopa-protests-continues-to-grow (caveat video)

Below is a sample from their list:

-- going "dark" --
38 Studios: dark
BoingBoing: dark
Epic Games: dark
Minecraft: dark
Red 5 Studios: dark
Reddit: dark
Riot Games: dark
Wordpress: dark

-- other participation --
Firefox browser: special default start page
Google: home page link
Mozilla: redirect home page (also see firefox)

http://www.mattcutts.com/blog/