i think toshiba has an alternative out now.
again, the sony product (hardware) is pretty awesome, but the interface is ass and the download system is retarded (automatically deleting books and you can only download 5 books a month from a pretty shitty selection (apparently)).
Sony - if only the software could be as good as the hardware
. I'd love a Libre for manga browsing but i want to be able to take more than 5 issues out a month.