As a software developer and open source contributor myself, I'd really like to see open source happen. But if no vendors respond to the RFI / RFP with a credible open source proposal, it will make things a lot harder.
Basically, SF would have to contract to build its own system. I made this point at last week's Commission meeting here: https://www.youtube.com/watch?v=SOOoXSOtR-s&t=1h04m55s
Currently they are researching the costs of implementing the proposed voting and counting machines (with human readable paper separating both machines). Also there was a preference for the software to be open source.
You could get in contact with some people of the commission:
https://twitter.com/cryptoron (part of the commission, now leads the costs investigation of the new proposed machines and software)
https://twitter.com/ArjenKamphuis (part of the commission and part of the hacker movement that got eVoting machines banned in the Netherlands in 2007 [2]).
[0] I don't think electronics outweigh the security of a paper based voting system anytime soon. Because of it's simplicity and transparency it's publicly verifiable in practice. Professor Halderman, who did a lot of research in electronic voting, won't expect secure electronic voting systems that can be used at large scale within the next 10 years, if ever: https://www.youtube.com/watch?v=JY_pHvhE4os#t=58m55s
[1] Unofficial abstract of the commission: https://www.kiesraad.nl/sites/default/files/every-vote-count...
Go back to paper ballots counted by hand.