This is some fascinating documentary-type multimedia work. It's called MediaStorm, run by a guy (Brian Storm) who used to be multimedia director at MSNBC. Its mission, it says, is to "usher in the next generation of multimedia storytelling by publishing social documentary projects incorporating photojournalism, interactivity, animation, audio and video for distribution across multiple media."
Pretty ambitious, but this clearly seems to be where the best audio/visual storytelling is headed. Check out what they're doing. For example, a sound-slide called "The Ninth Floor" is introduced like this:
"In 2004, anywhere from 20 to 30 young addicts lived on the ninth floor of an elegant narrow building overlooking Fifth Avenue in Manhattan. The squatters had turned the sprawling apartment into a dark, desperate and chaotic place."
Once you click on it, it will hook you like a strong narrative does.