FearNet.com has made the entire comic (or is it graphic novel?) 30 Days of Night: Dust to Dust available online. The online video production is available from the source at FearNet, and is also on Hulu.
I think we'll be seeing a lot of this type of cross-promotion online in the future. Goes like this: 1) release storyboards (with or without sound/acting like Stephen King's 'N is Here') for free, then 2) release a super low-budget video version in 5-7 minute webisodes (or, in King's case, publish the novel), 3) make your money by selling advertising during the webisodes, or by selling copies of the novel.
This approach seems very well suited for horror and sci-fi. Gemini Division, a plucky sci-fi thriller, just rolled out yesterday with two webisodes. There's no comic book teaser to go with it, however NBC doesn't really need that kind of thing to hook an audience.
Here's an episode of Dust to Dust I snagged from Hulu.