Fast Company takes a look at how The Guardian produced their multimedia NSA story:

Sure, they could whip up a 5,000-word explainer and hit “publish” (as others have done and will undoubtedly continue to do) but today’s digital news ecosystem calls for something more immersive and engaging. To achieve that, they would need to blend a written narrative with interactive elements and video clips and package it all in an eye-catchingly beautiful layout. Like the New York Times‘s Snow Fall and Pitchfork‘s interactive feature on Daft Punk, NSA Files Decoded needed to feel like an experience rather than a news article.

Lots of nice, crunchy technical detail in there for the production-minded.