I sent an email to my congressman in the House of Representatives (Justin Carter, TX), asking him to justify his vote against Rep. Amash's amendment to defund select NSA programs, PRISM among them. I haven't received - and don't necessarily expect - a response.
Do you have any plans for a next step should your letter be ignored? I'm interested in being vocal about this, but I'm not sure electronic correspondence packs enough of a punch.