Just recently I found out people have created PDFs or CBR (much like a PDF) of comic books. Usually I would just read and view them in Preview which works ok, but Comic Book Lover is really much better.
It allows me to easily keep a library of all my ‘digitized’ comic books. It has an ‘iTune-ish’ interface so working within the application is quite easy.
I was able to create some Smart Lists that further organized my comics. You can also set bookmarks when you’re reading a comic book so that you can go to that point quickly.