Just Foreign Policy has a running counter of violent deaths in Iraq since our invasion in 2003. They have a slew of things you can do as well: contact Congress, write a letter to the editor, or hey, post it on your blog. They do make it pretty easy.
I have been offline for a bit since my grandma died last week, and expect to be posting only minimally for now. But, I still expect to be in Seattle on October 27th and hope to see you there.