I'm actually really impressed with it as an idea. I work on a project that facilitates volunteer management, and we're currently looking at ways in which volunteer achievement can be acknowledged. We were planning to implement our own internal "badges" (achievements, awards, whatever) system, but it seems logical that we should consider supporting the Open Badges standard so that volunteers can show off their "volunteering portfolio" on other sites. "Hey look, this guy's done over 100 hours of community centre work!"
Thanks for sharing.