Thunder Road, pictured on the right, is the first comic book in the U.S. to be released exclusively on the cell phone.
There are a handful of traditional comic books that are also being released on a subscription basis. From physorg:
For $4.49 a month on Verizon, or $3.99 a month for AT&T and Sprint, subscribers can view nearly a dozen different traditional comic books. There's also a separate subscription service for Japanese comics called manga. The comic books range from well-known names like "Bone" and "Teenage Mutant Ninja Turtles," to up-and-coming books, such as crime noirish "Umbra" and Hindu folklore-inspired "Devi." The comics site adds new chapters or issues for each title every week.To subscribe, check out: http://www.gocomics.com/