The Library Thing Mobile App didn't display well on my iPhone. So I wrote a frameset wrapper around it to give the iPhone the proper meta tags to adjust the pagesize better. This is just a hack, but it works for me, for now.

Library Thing for iPhone

Until now I've been trying to keep track of my books on this wiki site (BookList) and use my iPhone, while at the bookstore, to determine if I'd already purchased a book or not. My goal is to eventually use http://www.librarything.com for that.

Comments below.