It's not actually an ebook reader, but (Score 2, Interesting)

I use my Iphone for reading most books these days. Back in the day, I used to travel a lot for work, and usually had a stack of books on my crusty old palm pilot, which was nice for carrying around, especially since I used it for a lot of other things as well.

These days, I don't go anywhere without my phone, and I find the screen just fine for reading books. A lot better than the old palm pilot. Since I'm already carrying the phone, the e-reader is basically free.