If possible*, I recommend that you get in touch with the developers of the website www.openpolitics.ca: they were the first to actually apply 'open politics' (which is just about what you're describing here) in a real-world environment with the aim of influencing actual party policy.

[*] The disclaimer is there because I'm not sure that the site is maintained anymore--they ran into a serious issue with Canadian libel law (which is unusually strict) although the offending content has since been removed. But a lot of useful theoretical stuff will be there, licensed as free and open content.

ETA: forgot to mention, most of the people who contributed to that wiki used to hang out at the openpolitics yahoogroup. Again, you'll find a lot of useful theory in the mailing list archives.