Diigo Dilemma

Friday, we were asked to review an article for class using Diigo. We were given the opportunity to use Diigo's highlighting tools and sticky note features to participate in a critical reading of the article "Connectivism: A Learning Theory for the Digital Age" by George Siemens.

As my English 101 students were also participating in a critical reading activity with their research articles, I was able to gain some feedback from my students about using Diigo in class.

Here is what we learned:
1. My students felt that a shared article provided a level of confusion which made them very uncomfortable. They felt, and I agreed, that reading something that someone else had previously highlighted and annotated made it difficult to read for themselves. We all wanted to read only what had been previously highlighted. I was distracted by the sticky notes as well, especially when you couldn't physically lift the sticky to read the text underneath.
2. The issue above is irrelevant when the article is saved to your individual library. If we were using this process for individual research, the highlighting, comments, and sticky notes of others would not interfere with our reading. This is a plus.
3. On another positive note, I discovered through research of my own this weekend that you can add articles from EBSCOhost to your Diigo library. However, I have not yet tried this with DISCUS or WebFeat. As a result, this is something I could possibly incorporate into my English 101 courses next fall. I could probably begin using Diigo with my English IV courses in a couple of weeks, but I may need to do more evaluation of the product first.
4. The downside to number three is that you cannot highlight or add sticky notes to the pdf text of an article. At least this was the case for the article with which I was experimenting. I have provided a link to the screencast of that article below.

http://www.screencast.com/t/NDZjYzVk

Please note the use of highlighting and sticky notes in the blue header above the article. The highlighting features and sticky notes would not work in the pdf version of the text. I could highlight; however, as soon as I clicked on a new sentence to highlight, the previous highlighting would disappear.

Concluding Thoughts:
I can certainly see the relevance of using Diigo in the classroom. I think it has great features, and I think it conserves paper. However, my 101 students would still have to provide a printed version of their sources when they submit final drafts because our college partner requires that those be submitted. Also, I think not being able to highlight or annotate a pdf version of a text could be a major drawback to using Diigo with my students. I do not want them to have to print some copies of their research in order to annotate and have others stored in Diigo. That would be a disaster waiting to happen when it comes time to create works cited pages and include internal citations, quotes, and paraphrases in the paper.

I would love to hear feedback from others. Has anyone tried using Diigo with their students? What other positive experiences have you had? Have you had any other negative issues that I could side-step?