Wikipedia still works. All you have to do is hit the ESC key when the page loads (before it switches to the black screen)......but you have to do this for every Wiki page you visit.
I would be all fore INGO joining the cause. Going without INGO for a day is a necessary sacrifice given what is at stake! SOPA is only the corner stone for what is to come afterward. If SOPA passes through legislation, then it opens the door for further restrictions and regulations on websites hosted within the United States. Before you know it - there would be no INGO to protest for anymore...