I always love to look at people their bookcases when I visit them. It normally tells quite a lot about someone what books they have collected over the years (and read of course).
Therefore it is quite interesting to see how sites like LibraryThing try to connect people by collecting information about the books you have read and how you tag them. This information is than used to connect people, get recommendations based on others input and yours. And of course show of your library on you blog (you guessed right, look in the left lower corner .
I wonder what yo can conclude by looking at the latest books I have read.