A few members of the Yahoo! Autos team created a new feedback and suggestion system during a recent company Hack Day incorporating some of the bubble-up recommendation system to their own support and feedback loops. Instead of submitting yet another request for motorcycle coverage on the site, the existing request is shown on the Yahoo! Autos feedback page allowing anyone on the Internet to +1 the recommendation. (via Y! Cool Thing of the Day)
I like the idea of the public-facing repository in an easy to browse and understand format. The multiple votes cast into a particular feature bucket should help the team prioritize and better represent user requests internally, as it takes much more time to read through individual requests for the same feature expressed many different ways.