No where to leave comments on the post, but I wanted to point out that the iPad has twice the pixel density on both axis' meaning that it has exactly 4x the resolution. So, icons should be set to 144x144.
I used "The Idiot" because that was the book that I was reading at the time of this writing. Using Calibre doesn't directly combat DRM, but the time you spend using it as a broker for consumption is time you are not spending in the B&N store buying books in a restricted format.
Though it may seem silly to read public domain books when there may be something new that you want to consume, if you can forfeit that experience of a new book, it is a great form of protest.