I was really intrigued by this article.  I can picture 4th and 5th grade students each having their own aggregrators and subscribing to RSS feeds that they are interested in.  Kentucky requires students to learn a massive amount of content.  Therefore, teachers have to spend less time on topics than they would like.   So for example, when a teacher teaches a unit on planets she may only have time to implement lessons on that topic for 4 weeks, however some of the students might want to continue studying planets because they are really interested in that topic.  By allowing students to have their own aggregators, these students could subscibe to a website or blog on planets and continue to learn additional information about the planets.  These students could then write blogs about what they have learned; the teacher can then grade the students on science and language arts.  Test scores would probably go up because students would take responsibility for their own learning.  The teacher could move on to other content as needed to meet state requirements, while students could individualize their learning by subsribing to feeds that correlate to their interests.  It seems like this idea would keep both teachers and students happy!