Part of the MERLOT project, this site is a "digital case story repository that hosts more than 70 discipline-specific multimedia stories." The stories themselves are interesting. Also of note, the Creating Stories tab, for more on the production of such collaborative multimedia stories.
Presented by the Knight Digital Media Center, these presentations are described as "multimedia and internet technology training workshops," on topics like Digital Storytelling ("How to tell stories with Data (Reallly)") and Web 2.0 Training ("Digital Visualization Strategy and Workflow" or "Data Visualization on a Budget"). While the workshops are geared to journalists, many of the lessons might be relevant to those in other public-facing fields as well.
Section on TechSoup Community devoted to Digital Storytelling. There are links to resources and information on a Techsoup Digital Storytelling Event that combines instruction and competition.