In what regard? Depth? Breadth? Looking at their site I think they have enough of the popular stuff covered to give them time to work their way into the long tail before their ebook reader is in enough hands to matter.
Plus they have PDF for a much more affordable price than the Kindle (the Kindle 2's PDF support is mediocre at best, stupidly terrible at worst). That's a killer feature for people who may already own a significant library of PDF content.
