I just uploaded a comic epub on MobileRead. When I came to chose the prefix, the genre of the book, I realised there is none called "Comics". It seems like I am the first one to publish such a book here. I would be very happy to be able to have comics on my reader. I have not found any so far. If such a category was to be created, it might motivate people to publish more comics.
Well it is just an idea. Maybe I am the only one intereseted. Anyway thanks a lot for a very good site.