At dinner on Monday night, Amy Yau showed Y and me a slick comic book reader that she recommends called ComicGlass. I particularly like its built-in web browser and import functionality.
After my disaster with ComicZeal (read about my iPad meltdown here), I will try out this CBR reader when I get back to the States. It is available in the App Store.
Amy also recommended the Marvel comic book reading app, because it does offer some comics for free.