Kronomy (which is currently in Beta) is a new software package that enables you to create a time line of anything you want - like maybe the history of your organization? - with descriptions, pictures and video, which you can then share. Kronomy also supports the usual socnet functions like commenting, sharing, and friending.
How might you be able to use this to promote your organization's good work to your volunteer leaders, members, and prospects?
Hat tip to Guy Kawasaki's blog for alerting me.