I really liked the recent "My library" feature of Google Books so I "stole" the feature for Cover Browser this weekend (see the "Add to my collection" links below each cover)...

coverbrowser.com

Here's an example gallery:
coverbrowser.com/my/philipp/co ...

Maybe you should add an option to see small versions of the covers so they can fit on your screen.

You mean in general or for the "My Collection" page?
And yeah, I want to add alternative ways to browse the site in the future, if I find good ones.

In general. I think the images are way too big and you could add an option to see the same images at a different size. See Picasa Web's album view.

I know the images are very big, it's kind of on purpose to allow easy exploration, but I know it's not for every taste. I will see what to do about alternative visualizations...