Ask HN: Should we have a “Who is hiring?” for non-profit volunteer positions?

We are a non-profit (http://www.secfirst.org) currently looking for a volunteer copywriter to help us with some content and PR stuff for the launch of our app, Umbrella - which helps journalists/aid workers/activists manage their security. It only requires a few hours of volunteer time so doesn't really fit into the current "Who is hiring?" - which is full, part-time or internships. Thus does it make sense to have a "Who is looking for volunteers?"