There are dozens of websites and petitions against action. Just take a look at this list: http://www.guardian.co.uk/antiwar/subsection/0,12809,884056,00.html And then there are the Hollywood efforts which have gotten tons of notice. We need to do more to show our support for action.
StopSaddamNow.org is the only Open Letter on the Internet we have found in favor of action against Iraq.
Go now and sign-up.