Accessibility Map Project - Geneva
The Megafone.net project invites "groups of people on the fringe of society to express their experiences and opinions through face-to-face meetings and mobile phones." They've worked on some very cool projects but I'm most impressed with their urban accessibility maps (thanks to Urban Tick for the link).
The Geneva and Barcelona accessibility maps were created by giving GPS-enabled camera phones to people using wheelchairs. Over a 6-month period, the mapmakers documented inaccessible barriers around their respective cities - each barrier was photographed and placed automatically on a mashup. Common barriers include stairways, inaccessible curbs, escalators, broken elevators, etc.
We've looked at institutional and campus-wide accessibility maps before but this is a great example of crowdsourcing accessibility data from the people that it impacts the most. Armed with this data, advocates for people that use wheelchairs and other mobility aids can present their story to municipal and institutional agencies, helping to transform our cities into inclusive environments for everyone.