Build a "whynot" type of Web site for communities. Deal with specific
community focused issues (due to geographic location, growth spurt,
etc.)- for example, I live in a small town in New Mexico, the town is
going through a growth spurt. Issues like gang activity, water
shortages, lack of sufficient medical care, traffic congestion,
etc. are beginning to rear their ugly heads. I'd like to see a venue
where local citizens could offer their constructive opinions and
solutions - these ideas could be shared with city leaders, those with
the power to make a change.

(A similar idea from another person) Mobile app where you snap
pictures/video of issues around your community (graffiti, broken
streetlights, potholes, etc.) and upload to a site. Users can search
by geo and vote on the ones they want to see fixed first. Local
government subscribes to a reporting engine/workflow service that
allows them to slice data and work more closely with their citizens in
improving their locality.