Technology for Keeping Track

I have been hearing about Shelfari for months (thanks Edward). So, I finally joined. Have to say it made me a bit mad. I said that I did not want my yahoo address book used to contact people, but it did. And it sent out a second notice for my "friends" to join. But, the concept and site itself I liked. I added a couple of books. It would take me a very long time to put all of my books on my shelf. I also went to Guru Library and added a couple of DVDs to the list. This one I will use more, because I have less DVDs but a good size collection. I would like to keep a record of what I have.