I might be the exception, but I think WiFi is imperative for readers that offer syncing of farthest page read, bookmarks, highlighting, etc. I don't think it is really much good to have an eInk web browser, but purchasing or downloading sample books via WiFi is also a plus. But mostly I want WiFi for syncing.

And speaking of syncing, the Sony readers do a really lousy job of this, especially as the non-WiFi/3G readers must use the Sony Reader Library app or third-party apps to sync. I want to be able to put down one reader and pick up another and immediately have my farthest page read, bookmarks, highlighting, annotations, etc. synced without having to find a USB cable and a PC. On iOS devices only iBooks does an outstanding job of syncing, even sideloaded books, but unfortunately there is no cross-platform syncing. Amazon's Whispernet does an outstanding job of syncing books purchased through Amazon and syncs across multiple platforms including PC/Mac, Kindle, Android, iOS, BlackBerry, etc., but it is for Amazon Kindle books only.