There are many, many sites that sell legit ebooks. Check out booksonboard and fictionwise, to name just two. Unfortunately, like Amazon's ebooks, most of these are DRM'd.

The wireless thing is cool, but ereaders existed for a long time without them. I think it would be cool to have whispernet, but it is by no means essential to the enjoyment of my ereader. The next gen bebook will have wifi access to read rss reads etc. as well.