Maybe consider donating to Mark Kelly & Gabrielle Giffords' PAC. I've heard that that Mark is actually a moderate republican, even thought he is married to a now-retired democratic congresswoman. The PAC is somewhat bipartisan http://americansforresponsiblesolutions.org/

Before her shooting in 2011, Rep. Giffords did blog regularly, Although she didn't give vote-by-vote explanations herself.

Very interested in this also. I'd be willing to help organize too (via Facebook or other websites).

I'd be much frustrated not to see startups cracking on this on elections to come, what with all the crowdfunding being carried over to many other domains (e.g. YC's first non-profit backing)