Thanks for this awesome program!
I also had the same (or at least similar) request regarding making it easier to navigate the catalog. I use the generated catalog so that my family, which is spread out over several cities in the US, can browse and download ebooks. They typically view the catalog using a desktop computer. So while the catalog is easy to navigate on an iPhone, it would be great to have some options to create a catalog that is more easily navigated using a full size browser for those of us using the catalog in this fashion.
Below are a few examples of how this might work. I generated the catalogs using the program Book Collector by Collectorz.com, a program that I used for cataloging my ebooks before switching to Calibre. In the options pages (see screen shots below) you can control pretty much everything, from size of thumbnails to background colors, how many books before paginating, etc. There are also built-in templates to use for the detail view (when you click on a book). The templates are just XML which can be easily edited and shared with other users.
Paged by letter - This catalog is generated with sorting by first letter of authors last name
Paged List - This catalog is generated by paginating after a user selectable number of books, sorted by author. I am using 100
Single Long List - This displays the entire catalog on one page, sorted by Author
These are screen shots of the options for generating the catalog:
