Obviously your product, ScreenDoor, addresses some of the concerns you're raising around better data collection. Glad to hear you're so enthusiastic about that approach.
The EFF isn't planning on selling software to members of Congress. However, we are considering offering users the ability to make their comments public, which'd create a large public dataset about messages sent to Congress. If we decide to go ahead with that, the open dataset would then be available for anyone to run analytics on and create reports for members of Congress.
Improving the ways people contact Congress is one piece of the puzzle. The other part is making sure that people get better responses, and we hope to work on that too.