ComicMonster will allow you to convert your comic book archive files (cbz, cbr, cb7) into PDF files.
It has a simple interface where you choose your archive files and a destination directory to put the resulting PDF files.
You can rearrange the images in a single archive file or delete images you want to exclude.
You can also work in a batch mode by converting entire directories at once.
ComicMonster will be coming soon either to this website or the App store.