Click the image to enlarge and read it. More info here and here; the Supreme Court will hear a case on the MCA.
Here's the Center for Constitutional Rights on this case. Sign their petition here. Send a copy of the Constitution to George W. Bush here (no pictures, but maybe someone will read it to him; perhaps animate it with hand puppets).
Sign Amnesty International-USA's petition here. Visit Tear It Down (Gitmo, that is) here.
Democracy Now on opening arguments: Attorneys Ask Supreme Court to Restore the Right to Habeas Corpus for Guantanamo Prisoners.