You meet someone new. You like him (her). For some of us the first thing we do (on the sly of course) is to check out the bookshelf. It is a great way to find out who you are really talking to.
Now you don't even have to leave home to check out other people's books. Flickr is a photo hosting web site. 1,119 people have uploaded photos of their stash of books. Amazing. You can post photos for private or public consumption. http://www.flickr.com/groups/bookshelf/pool
It is not just the books but how they are stacked, piled and housed. What the person is reading and what it reveals about what this individual cares about.
I'd do it except that I need to keep a low profile - The number of books and papers I've got might be violating a couple of fire codes.
Flickr is free and, if you are a Yahoo member, you can log in with your user name. You can create a Flickr page in no time. It is very easy to upload photos. Check it out.