I took a minute and added the LibraryThing Blog Widget that you can use in some different ways, but that I have set up to simply show five random books from my catalog. I guess this is another reason to keep "adult" titles out of my public catalog. The whole setup process was incredibly easy. That's one of the things I love about LibraryThing, they try to make everything as simple as possible.
I tried to do something similar with flickr so that it would show random photos from my collection, but flickr didn't seem to have an easy widget to do that and I couldn't get the slideshow option in Blogger to be limited to only my photos. Oh well, there are only about a billion flickr widgets out there so maybe I'll try doing it with somebody else's java later.