Marvel has been distributing its products via Marvel Digital Comics Unlimited since 2007. It is a monthly subscription service, providing new titles and digitized classics from the Marvel archives.
DC recently launched the DC Digital Comics Store, powered by Comixology.
Both offer free comics and free excerpts, hoping to attract new readers. I personally have been enjoying seeing comic book content in the new media. Print sales of comic books unfortunately were hurting before digitization had an impact, so maybe e-comics might be the financial savior of the comics industry.
As Hollywood turns to Marvel Entertainment, DC Entertainment, and other comic book publishers for ideas, I am glad to see that new avenues are being explored to find audiences for the comic book stories that still have a place in our popular culture.