A long time subscriber to the knowledge oriented magazine, mental_floss, my girlfriend Kelly showed me a wicked cool ap from Zinio that comes with her subscription. Using a combination of Flash and Contentguard (for rights management), Zinio has made itself a very neat ap for view magazines and books digitally on your computer.
With a very short download for both the magazine/book and the ap (maybe only necessary to download the desktop version if you have Flash and only want to read your periodical in a browser), you essentially get the entire printed version of whatever magazine/book you want. A very well defined user interface allows you to navigate and scale to any article.
More and more its going to be key for publication companies to continue to offer these user-friendly digital alternatives to their books. I find this one to be an excellent solution as it doesn’t detract from the original printed version- both can exist and look and feel nearly the same.