I run a small website, WriteYourRep.org, that allows you a mail a real letter to your Federal representatives from your computer. You select the recipient and write the letter, we stamp it and send it to Washington, DC.
I did a few searches and couldn't find anything about political causes. I've worked with small sites that market a bit to their visitors, but never professional marketers.
Does anyone have experience within the political niche? Any tips for what I can do?