I recently have been reading Snoop: What your stuff says about you by Sam Gosling and I managed to read most of it in 2 days! Very easy read for me, normally it would take me a few weeks to read a book that size. It is very interesting book, makes you think beyond what you see in front of you. Also found that my worrying side of my personality is double the average... which is worrying :P
Just thought I'd pass on this link of an interview published on the Facebook blog yesterday.
Facebook Blog Link
In the book I skipped past the online parts (because I was trying to analyse a bedroom not a facebook profile) but this link shows what he is looking into now for those that are interested :)