Glad the new features are helpful. Being able to not only change the location but the tab a field appears in was something we worked hard on as some fields that were in extras tab were important to be able to move them to main if they were of meaning to the user.
Integrated Cover Flow is something that is easier to do if our program were Leopard only, Apple even includes a sample program. However as we will be supporting Tiger for a while it might be some time in coming. But do take a look at our Quick Look video
you can use Bookpedia with Cover Flow, Spotlight as well as Quick Look if you are just browsing information and not editing you don't even need to open the program. Create a smart folder that searches for PediaItem
and that is set to display in Cover Flow.