This is an amazing free software tool that could be adapted for all kinds of community telephone campaigns. It was designed for the Red Cross blood donor program and based on the Ribbit voice platform.
“Save a Life creates contact-on-demand access to an entire social networking community. With Save a Life, a community member with an urgent need to reach the entire membership or a segment of the community by phone can eliminate the need to look up phone numbers. Mashing up Ribbit, Yahoo Maps, and Google Calendar, Save a Life can be used for such applications as an emergency donation campaign or an emergency dispatch service.”