Try visiting on an iPad, iPhone, iPod Touch, Droid, or Nexus One for the installable HTML5 version. It will then allow you to view both text and images without an internet connection _even in a darkened room_.
http://developer.apple.com/safari/library/codinghowtos/Mobil...
Side note: I wonder if this will happen to the Kindle app?
Apple is shipping iBooks as a non-bundled application to be downloaded in the free section of Books in the App Store. Do you really think they would delete every other app in the category they put their offering in? Further, iBooks is only available in the United States at launch. Will they nuke reader apps in Finland despite iBooks not being available there?