I collect books, and read some of them.
I currently have about 2500 books in my library - I hope to get all of it listed eventually.
Currently some of my books are listed on LibraryThing, some are listed on my google bookshelf, some are listed in my Amazon profile.
I hope to catalog my digital library eventually as well. Most of my titles come from Project Gutenberg
I add books to my Amazon wishlist regularly, most of them are there for further research, not because I am ready to purchase them.
The main item on my wishlist right now is a subscription to Books24x7
. I had access to their complete collection at my last job, and found its resources very useful. I can get access to part of the Computer library if I subscribe to ACM for a year. The business library appears to require a subscription.