i have some books in my phone (from the aptly-named site "booksinmyphone.com"
) which is an lg viewty, not an iphone or smartphone. they are convenient for short métro trips or similar circumstances when i have no other reading material, but i would never read in those conditions at home. i am glad to have it though ; sometimes it comes in handy.
i found it interesting that although the article talks a lot about ebooks being cheaper they gloss over all the sources for completely free books ; i think they mentioned that once in passing. they even mention all the pd books available for only $1, so much cheaper than the paper versions... whereas using stanza (which they do talk about) you can get any book from feedbooks for 0$, including a lot of classics.