Frank Miller's 300
Check out the trailer for the adaptation of Frank Miller's 300. I've never read it (Eric, can you tell me more?), but the trailer definitely intrigues me. Like Sin City, it was shot entirely on green screen with CG backgrounds to try and preserve the look of a comic book illustration. The trailer looks like a cross between Night Watch, Lord of the Rings, and God of War. Seriously.
Read the production blog here, should you be so inclined.

300 is rad, although I don't think the CG looks as interesting as the Sin City stuff. PS NIN RULZ
Visually appealing, but the dialog/acting is awful.
hey Michelle, don't go start liking on things
About 300: The oversized graphic novel retells the legend of The Battle of Thermopylae, where it is said that a group of 300 hundred spartan warriors fought off like, a million Persians. This was the legend that inspired Frank Miller's earlier work, Sin City: The Big Fat Kill (remember in the movie when Dwight lead the cops into that alley?). The graphic novel is awesome, and arguably Frank Miller's last good book. I got it put on a college syllabus back in Utah. The preview looks neat I guess, but seeing as how most of the shots look exactly like the comic, ala Sin City, it seems that everyone is still forgetting that comics aren't movies and vice-versa. Sin City was a neat experiment where the innovative flash of a comic-book-brought-to-life was enough to blind viewers to the ineffective dialogue and ackward cinematography. But if they are going to insist on panel for panel adaptations, I'll just stick to the book and move the pages real fast! Why don't they just make a fucking cartoon?