A group of us (democracy-passionate friends) just launched OpenBallot, a platform of 40+ voter guides. The goal is to save you research time by showing you all the endorsements and explanations you care about in one place. You can use this to fill out your ballot, which is private by default. You can then share with friends or publish your views on our platform.
The site is our first prototype; if you're in SF, please try it and share your feedback! We're hoping to use this to eventually scale to all over the country.
I've thought about doing basically this exact project a number of times. The biggest thing I'd wanna change is to not focus on the guides so much. Lots of organizations are shy about making an endorsement so guides can often be pretty barebones. A much more useful view, imo, would be to allow users to select a number of voter guides, and then view a full ballot. With badges by the choices endorsed by whatever guides they have activated