Tried to contact my CO senators today... Got this:
"Sorry, the web page you have requested is experiencing technical difficulties. The Webmaster has been alerted. You will be automatically redirected to the www.senate.gov
home page after 10 seconds. If this problem persists, please contact the Office of the Secretary Webmaster at firstname.lastname@example.org."
From what I've read, Udall opposes PIPA, Bennet supports it (argh).