Mine are Langevin, Chafee, and Reed (oh my!).
Your congresspeople/Senators need to hear from their constituents, or howthehell are they going to know how they feel, and more important, how they'll vote in upcoming elections.
Writing/Calling your representatives may be the most important thing (along with voting) you can do, in the Equal Marriage movement or any other. Go, shoo! Be informed, Grasshoppers. *bows*