The Nestle-Aland Novum Testamentum Graece is now available on the net. No footnotes etc, but the main text is clear and readable. Go here.
The German Bible Society, furthermore, announces that the Nestle-Aland digital will be available as download for Microsoft Windows, OS X, iOS and Android in 2013.
The 28th edition of the Nestle-Aland had to accomplish two different tasks. First, the apparatus had to be revised thoroughly to give it more clarity and make it easier to use. Secondly, the text-critical in-sights and decisions resulting from work on the Editio Critica Maior of the Greek New Testament had to be incorporated. As a consequence of these alterations, which so far concern only the Catholic Letters, the Nestle-Aland has for the first time in its history a different presentation for different parts of the text. The Catholic Letters were revised according to a fundamentally new concept which in the long run will be adopted for the entire edition. The revision of the remaining texts was confined to a thorough inspection and rearrangement of the apparatus, while the basic structure was left untouched (adopted from the publisher’s announcement).