This paragraph is the one with the most interesting set of assumptions. There are implications about "validity" Bass notes earlier and the role of numbers as "less robust" rather than, say, an interesting and important ingredient in that conversation. Mostly though I see the designation that the rubrics are "too broad to be useful" as a flag that these are not really rubrics, but, well, flags...
Focusing on ePortfolios in a Web 2.0 context. Open source is a construct--unbundling the code from the services. So that teachers no longer own the content--the content is open and free. Can education itself open up?
I direct the Center for Online Learning at Portland State University and am a senior fellow with the Association of American Colleges and Universities. I also co-direct AAEEBL, an international organization that promotes the use of ePortfolios for educational transformation.