Originally Posted by Philantrop
I, too, support your position with regard to proprietary
formats but maybe you could consider adding support for (a subset of) the Comic Book Archive file format
. It's a de-facto standard and "open" in the sense of basically being a simple archive.
You can find out more on CBR and CBZ on our own wiki. It would be a good format to support however it needs really good image handling such as fit to screen, zoom, pan and perhaps a kind of jumping around the page to facilitate reading comic books. Most Comic book readers are fairly primitive. The wiki page talks about metadata for example.