I've noticed that some of the things that the beginning of the article mentions have happened in my life. When I was younger, in the days when my family had internet but a slow connection and limited time in the day that it could be used, I used to be able to sit down and just enjoy reading fairly lengthy books for long stretches at a time; upon entering college and having access to high-speed internet, and a faster ability to gain information and communicate (though in my case, it wasn't texting, it was instant messaging), it required more effort on my part to be able to sit down and read longer reams of text.
What it's saying about Diigo being a tool for helping students is interesting to me. It states that the interactive nature of Diigo might appeal to modern students, allowing them to communicate and take a more active approach to reading. From what I've seen of Diigo since it's been installed on my computer, I'd have to agree that this is the case. In several places (Google, Wikipedia, etc.), I've seen what I assume are high-school and undergraduate students leaving sticky notes on the webpage, using the notes to cite things that they find interesting on the page and just generally forming chains of communication with other students (one of the more memorable sticky notes I've seen, which I believe has been taken down by now, involved students who were acquainted with one another carrying on a conversation about class, which eventually evolved into two of the students having a heated debate about why one of them was just going to let the other leave after graduation without stating his/her, I assume, romantic feelings or something to that nature. It was...very interesting. And odd.)
Another thing that occurs to me about why Diigo might be an effective tool for helping kids read is that it might help liven up what might be a very dull text. I know from personal experience, the textbooks/books that I've enjoyed reading for class more have been the ones were the author showed some sense of humor in his/her writing. Finding a fun author in class readings, though, can be kind of hit-and-miss. I guess that with Diigo's annotation tools, though, even really boring and tedious readings can be made more engaging because of the insights and more colloquial tone of Diigo users.
The NETS-A standards that this article employs is the fourth standard, the standard regarding improving the organization through the use of information and technology, with the emphasis of the article being on finding alternate means of getting kids to read, outside of the traditional book format, that also takes advantage of the social networking trend and allows students to take an active role in their reading.