To help drive public awareness of SOPA, a very bad piece of legislation, this site is shut down today. Visiting the main page will direct you to http://sopastrike.com/strike after 5 seconds.
You can also read about this at Pragmatic Programmers.com, my publisher's url. They, just like Google, Wikipedia, and countless other sites, are trying to be sure everyone understands the legislations we're in danger of seeing passed.