Cluin, try a freeware pop-up killer, they work pretty well.

For people with an interest in organizations like MoveOn.org, The Nation website has a brief synopsis of several organizations' mission, their plans/tactics, and contact information, including clickable links here:

http://www.thenation.com/doc.mhtml?i=20030106&s=interns

Then, the page link below at The Nation has clickable links to all of their No War With Iraq articles, and the most exhaustive list of clickable links to anti-war organizations I've seen on the web so far:

http://www.thenation.com/directory/view.mhtml?t=040307