Love books but also love my kindle
great thing to have for reference guides. I work in I.T. and its great to have guides, reference books, instruction manuals etc offline and on hand.
currently working with my boss setting up our first terminal server/services and having the terminal services resource kit on hand is great. the actual book is 528 a4 sized pages when a kindle is tiny, the resources that come with the hard copy are available online and it means I can throw it in my bag and review thing over night.
I could do all this on my smartphone I guess but I prefer reading off the kindle.