I now pretty much stick to buying ebooks and reading them on my iPad. Mostly it's a better reading experience, with the exception that I can't quickly backscan or forward scan. The biggest impetus, though, is that my house is already overloaded with books. I love being able to buy books but not having to warehouse them. Macworld has a great tip on how you can download free ebooks to your iPad from Project Gutenberg, which has 33,000 titles.