Current TV has been interesting since its inception, but it's getting a lot more interesting now. Sporting an elegant new design and an energized community, the site offers remarkably high quality video storytelling from a huge range of sources.
It'll take you a while to get your feet wet at Current; I feel like I've just started. Virginia Heffernan's blog The Medium at the NYT has a short exploration that might help you get started.
I especially like this story, which I found while poking around earlier.
UPDATE: Here's a second piece well worth watching: