I just really wanted to try in since I read so much fic.. I bought the cheapest one in the store and it takes .pdf and .txt and .doc and a few more.. so I just copy the fic from internet to a word document or something and then you can read it like a book.. it's great :)

most e-readers come with a video and music player as well so I love it when I'm stuck waiting for a meeting or travle.. of course you can put in normal e-books too, not just fics ;)