I saw the other thread about the free photos and there was some interest. So I thought I would share this. I emailed a few of these guys and got several back. Most pre-printed but some real and some personalized. I know the white house sends free photos as well but never tried it.
http://www.senate.gov/general/contact_information/senators_cfm.cfm
http://www.senate.gov/general/contact_information/senators_cfm.cfm